J .G.S.M. V o l . 1 5 No. 4 November 2 0 1 4 hal . 1 8 5 - 1 9 4 1 8 5

B I O S T R A T I G R A F I NANNOPLANKTON D A E R A H R A J A M A N D A L A NANNOPLANKTON BIOSTRATIGRAPHY OF THE RAJAMANDALA AREA

O l e h

U n g g u l P r a s e t y o W i b o w o 1 d a n R u b i y a n t o K a p i d 2

M u s e u m G e o l o g i , P u s a t S u r v e i G e o l o g i , B a d a n G e o l o g i , J l . D i p o n e g o r o N o . 5 7 B a n d u n g V r o g r a m S t u d i T e k n i k G e o l o g i , F I T B , I n s t i t u t T e k n o l o g i B a n d u n g , B a n d u n g 4 0 1 3 2

E - m a i l : u u n g p w @ y a h o o . c o m

Abstrak

A n a l i s i s b i o s t r a t i g r a f i nannoplankton d i l a k u k a n p a d a 2 6 s a m p e l spot sampling y a n g b e r a s a l d a r i d a e r a h R a j a m a n d a l a , P a d a l a r a n g , K a b u p a t e n B a n d u n g , P r o v r n s i J a w a B a r a t . H a s i l d a t a l a p a n g a n p a d a lokas'i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a d i j u m p a i a d a n y a 6 s a t u a n b a t u a n d i m a n a b e r d a s a r k a n a n a l i s i s b i o s t r a t i g r a f i nannoplankton d i 6 s a t u a n b a t u a n t e r s e b u t d i d a p a t k a n k i s a r a n u m u r s e b a g a i b e r i k u h s a t u a n b a t u p a s i r k o n g l o m e r a t a n b e r u m u r t i d a k l e b i h m u d a d a r i E o s e n A k h i r d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i B a y a h y a n g b e r u m u r E o s e n T e n g a h - A k h i r ; s a t u a n b a t u l e m p u n g b e r u m u r E o s e n A k h i r - O l i g o s e n A k h i r d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i B a t u a s i h y a n g b e r u m u r O l i g o s e n A k h i r ; s a t u a n n a p a l b e r u m u r O l i g o s e n A k h i r - M i o s e n A w a l d a p a t d i s e b a n d i n g k a n d e n g a n A n g g o t a N a p a l F o r m a s i R a j a m a n d a l a y a n g b e r u m u r O l i g o s e n A k h i r - M i o s e n A w a l ; S a t u a n b a t u p a s i r - b a t u l e m p u n g b e r u m u r M i o s e n A w a l - M i o s e n T e n g a h b a g i a n b a w a h d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i C i t a r u m y a n g b e r u m u r M i o s e n A w a l ; s a t u a n b r e k s i v u l k a n i k b e r u m u r M i o s e n T e n g a h d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i S a g u l i n g y a n g b e r u m u r M i o s e n T e n g a h ; s e d a n g k a n s a t u a n b a t u a n v u l k a n i k t u f a a n y a n g m e n u t u p i F o r m a s i S a g u l i n g d a p a t d i s e b a n d i n g k a n d e n g a n s a t u a n b a t u a n p r o d u k v u l k a n i k t u f a n K u a r t e r .

Kata k u n c i : B i o s t r a t i g r a f i , nannoplankton, nannofosil, R a j a m a n d a l a .

Abstract

B/ostratgraphic analysis of nannoplankton has been conducted on 26 spot sampling samples from the Rajamandala area, Padalarang, Bandung District, West Java Province. Based on field data, the study reveals that there are 6 rock units as follows: (1) conglomeratic sandstone unit of not younger than Late Eocene and it is comparable to Bayah Formation of Middle - Late Eocene, (2) claystone unit of Late Eocene - Oligocene which is comparabe to the Batuasih Formation of Late Oligocene, (3) marl unit of Late Oligocene-Middle Miocene which is comparable to the Marl Member of Rajamandala Formation of Late Oligocene - Early Miocene, (4) sandstone - claystone unit of Early Miocene Middle Miocene and is comparable to the Citarum Formation of Early Miocene, (5) volcanic breccia of Middle Miocene and is comparable to the Saguling Formation of Middle Miocene, and (6) tuffaceous volcanic rock overlying the Saguling Formation, and is comparable to Quaternary tuffaceous volcanic products.

Key words: Biostratigraphy, nannoplankton, nannofossil, Rajamandala

Pendahuluan

B a t u g a m p i n g R a j a m a n d a l a m e r u p a k a n s a l a h s a t u s i n g k a p a n b a t u g a m p i n g t e r t u a d i J a w a B a r a t . K e b e r a d a a n n y a s u d a h l a m a m e n a r i k p e r h a t i a n p a r a p e n e l i t i s e p e r t i H a r t i n g ( 1 9 2 9 ) ; Z w i e r z y c k i d a n K o o l h o v e n ( 1 9 3 6 ) ; K u p p e r ( 1 9 4 1 ) ; B e m m e l e n ( 1 9 4 9 ) ; S u d j a t m i k o ( 1 9 7 2 ) ; K o e s o e m a d i n a t a d a n S i r e g a r ( 1 9 8 4 ) . N a m a b a t u g a m p i n g R a j a m a n d a l a p e r t a m a k a l i d i k e n a l k a n o l e h M a r t i n ( 1 9 1 1 ) u n t u k b a t u g a m p i n g d i d a e r a h B u k i t R a j a m a n d a l a d i m a n a H a r t i n g ( 1 9 2 9 ) r n e n a m a k a n n y a s e b a g a i B a t u g a m p i n g T a g o g a p u s e d a n g k a n B a u m a n n

( 1 9 7 2 ) m e r u p a k a n o r a n g p e r t a m a y a n g m e n a m a k a n s a t u a n b a t u g a m p i n g i n i s e b a g a i F o r m a s i R a j a m a n d a l a . B e r b a g a i b i d a n g p e n e l i t i a n g e o l o g i p e r n a h d i l a k u k a n d i d a e r a h i n i .

S t u d i b i o s t r a t i g r a f i f o r a m i n i f e r a f o r a m k e c i l m a u p u n b e s a r t e l a h d i l a k u k a n d i a n t a r a n y a o l e h A d i n e g o r o ( 1 9 7 3 ) d a n A d i s a p u t r a - S u d i n t a d a n C o l e m a n ( 1 9 8 3 ) , s e d a n g k a n p e n g g u n a a n m i k r o f o s i l l a i n t e r u t a m a nannoplankton m a s i h j a r a n g d i l a k u k a n d i d a e r a h i n i . P e n e l i t i a n i n i b e r m a k s u d u n t u k m e n e l i t i k o m p o s i s i nannoplankton d e n g a n t u j u a n m e r e k o n s t r u k s i b i o s t r a t i g r a f i d a e r a h R a j a m a n d a l a .

N a s k a h d i t e r i r n a : 1 0 J u l i 2 0 1 4 R e y i & i t e r a k h i r : 0 4 N o v e m b e r 2 0 3 4

1 8 6 J .G.S.M. V o l . 1 5 No. 4 November 2 0 1 4 hal . 1 8 5 - 1 9 4

P e n e l i t i a n i n i d i h a r a p k a n b i s a m e n a m b a h p e r b e n d a h a r a a n s t u d i b i o s t r a t i g r a f i t e r u t a m a b i o s t r a t i g r a f i nannoplankton d i d a e r a h i n i .

Metode

A n a l i s i s b i o s t r a t i g r a f i nannoplankton d i l a k u k a n p a d a 2 6 s a m p e l l a p a n g a n . D i k a r e n a k a n c i r i b a t a s a n t a r f o r m a s i d i d a e r a h R a j a m a n d a l a u m u m n y a t e r t u t u p o l e h t a l u s h a s i l r o m b a k a n d a r i b a t u a n g a m p i n g i t u s e n d i r i m a k a p e n g a m b i l a n s a m p e l d i l a k u k a n d e n g a n c a r a s p o t s a m p l i n g m e n g i k u t i P r i n g g o p r a w i r o d a n K a p i d ( 2 0 0 0 ) . Nannoplankton d i e k s t r a k m e n g g u n a k a n s t a n d a r p r e p a r a s i m i k r o p a l e o n t o l o g i y a n g d i l a k u k a n d i L a b o r a t o r i u m M i k r o p a l e o n t o l o g i F I T B - I T B , B a n d u n g d e n g a n m e t o d e p r e p a r a s i p o l e s (smear slide method) s e d a n g k a n p e n g a m a t a n r i n c i nannoplankton m e n g g u n a k a n m i k r o s k o p p o l a r i s a s i . A n a l i s i s b i o s t r a t i g r a f i m e n g g u n a k a n m e t o d e k u a n t i t a t i f d e n g a n 1 5 0 l a p a n g p a n d a n g s e d a n g k a n d e t e r m i n a s i z o n a nannoplankton m e n g g u n a k a n z o n a s i nannoplankton T e r s i e r - K u a r t e r d a r i M a r t i n i ( 1 9 7 1 ) .

Daerah penelitian

D a e r a h p e n e l i t i a n t e r l e t a k d i b a g i a n t e n g a h J a w a B a r a t k u r a n g l e b i h 2 0 k m k e a r a h b a r a t l a u t d a r i K o t a B a n d u n g , t e p a t n y a d i K e c a m a t a n P a d a l a r a n g , K a b u p a t e n B a n d u n g , P r o v i n s i J a w a B a r a t ( G a m b a r

1 ) d e n g a n p e t a g e o l o g i m a s u k k e d a l a m p e t a g e o l o g i L e m b a r C i a n j u r ( S u d j a t m i k o , 1 9 7 2 ) .

Tataan Geologi Regional

D a e r a h R a j a m a n d a l a s e c a r a u m u m b e r u p a t i n g g i a n b e r l e r e n g t e r j a l d a n l e m b a h . T i n g g i a n b e r l e r e n g t e r j a l t e r d i r i d a r i b a t u g a m p i n g y a n g m e m p u n y a i k e k e r a s a n j a u h l e b i h b e s a r d i b a n d i n g b a t u a n d i s e k i t a r n y a s e d a n g k a n m o r f o l o g i r e n d a h y a n g m e m b e n t u k l e m b a h u m u m n y a t e r s u s u n d a r i b a t u a n k l a s t i k y a n g m e m i l i k i k e k e r a s a n l e b i h k e c i l d a r i b a t u a n d i s e k i t a r n y a . P e n y e b a r a n F o r m a s i R a j a m a n d a l a b e r a d a p a d a j a l u r P a d a l a r a n g - S u k a b u m i ( G . W a l a t ) . B a t u g a m p i n g F o r m a s i R a j a m a n d a l a m e r u p a k a n p e r b u k i t a n k a r s t b e r k e t i n g g i a n a n t a r a 7 0 0 - 9 0 0 m d i a t a s p e r m u k a a n l a u t d a n m e m a n j a n g d e n g a n a r a h b a r a t d a y a - t i m u r l a u t d a r i d a e r a h T a g o g a p u s a m p a i d a e r a h S a g u l i n g . P e r b u k i t a n i n i j u g a d i s e b u t s e b a g a i P u n g g u n g a n R a j a m a n d a l a (Rajamandala Ridge).

Stratigrafi Regional

S t r a t i g r a f i r e g i o n a l m e n g a c u p a d a p e n e l i t i a n t e r d a h u l u M a r t o d j o j o ( 1 9 8 4 ) s e d a n g k a n s t r a t i g r a f i d a e r a h p e n e l i t i a n R a j a m a n d a l a m e n g a c u k e S t r a t i g r a f i d a e r a h p e n e l i t i a n R a j a m a n d a l a h a s i l p e n e l i t i a n G e o l o g i c a l R e s e a r c h G r o u p - I T B ( 2 0 0 9 d a l a m L a b o r a t o r i u m G e o l o g i D i n a m i k 2 0 1 1 ) ( G a m b a r 2 ) .

Gambar 1 . Peta daerah penelitian berada dalam kotak merah (modif ikasi dari pela google earth).

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1 8 8 J .G.S.M. V o l . 1 5 No. 4 November 2 0 1 4 hat. 1 8 5 - 1 9 4

P a d a M i o s e n T e n g a h s t a t u s C e k u n g a n B o g o r m a s i h m e r u p a k a n c e k u n g a n b e l a k a n g b u s u r d e n g a n d i e n d a p k a n n y a F o r m a s i S a g u l i n g p a d a l i n g k u n g a n l a u t d a l a m d e n g a n m e k a n i s m e a r u s g r a v i t a s i . P a d a a k h i r M i o s e n T e n g a h m u l a i d i e n d a p k a n F o r m a s i B a n t a r g a d u n g y a n g d i c i r i k a n o l e h e n d a p a n t u r b i d i t h a l u s a k t i v i t a s k i p a s l a u t d a l a m ( M a r t o d j o j o , 1 9 8 4 ) .

P a d a M i o s e n A k h i r , C e k u n g a n B o g o r m a s i h m e r u p a k a n c e k u n g a n b e l a k a n g b u s u r t e m p a t d i e n d a p k a n n y a F o r m a s i C i g a d u n g d a n F o r m a s i C a n t a y a n . L i n g k u n g a n p e n g e n d a p a n k e d u a n y a a d a l a h l a u t d a l a m dengan m e k a n i s m e a r u s g r a v i t a s i . S e b a g i a n C e k u n g a n B o g o r p a d a P l i o s e n s u d a h m e r u p a k a n d a r a t a n y a n g d i t e m p a t i o l e h p u n c a k - p u n c a k g u n u n g a p i y a n g m e r u p a k a n jahr m a g m a t i s ( b u s u r v u l k a n i k ) . D a e r a h p e g u n u n g a n s e l a t a n b a g i a n s e l a t a n m e n g a l a m i oenumnan dan genang l a u t y a n g m e n g h a s i l k a n F o r m a s i B e n t a n g s e d a n g k a n d i b a g i a n utara terjadi a k t i v i t a s g u n u n g a p i y a n g m e n g h a s i l k a n F o r m a s i B e s e r ( M a r t o d j o j o , 1 9 8 4 ) . P a d a P l i s t o s e n s a m p a i R e s e n , g e o l o g i P u l a u J a w a s a m a d e n g a n s e k a r a n g . A k t i v i t a s g u n u n g a p i y a n g b e s a r t e r j a d i p a d a p e r m u l a a n P l i s t o s e n y a n g m e n g h a s i l k a n F o r m a s i T a m b a k a n d a n Endapan G u n u n g a p i M u d a ( M a r t o d j o j o , 1 9 8 4 ) .

Struktur Geologi

P u n g g u n g a n R a j a m a n d a l a m e r u p a k a n s e s a r n a i k b e r a r a h timur \aut ~ b a r a t d a y a dengan k e m i r i n g a n s e k i t a r 4 0 - 6 0 d r a j a t k e a r a h s e l a t a n y a n g d\perk\rakan a k i b a t d a r i p e r i s t i w a s u b d u k s i p a d a s e k i t a r u m u r p e r t e n g a h a n T e r s i e r a t a u j u g a p a d a saat p e r i s t i w a o r o g e n e s i s P l i o - P l i s t o s e n y a n g t e r j a d i d i b a g i a n s e l a t a n P u l a u J a w a yang m e n g a r a h k e utara. B a g i a n u t a r a d a r i P u n g g u n g a n R a j a m a n d a l a i n i d i j u m p a i s t r u k t u r g e o l o g i y a n g k o m p l e k s s e d a n g k a n b a g i a n b a r a t n y a d i j u m p a i a d a n y a p e m b a l i k a n , k e m u d i a n d i b a g i a n t i m u r n y a , s e s a r n a i k P u n g g u n g a n R a j a m a n d a l a i n i b e r a s o s i a s i dengan s i n k l i n B e n g k u n g , S e a r a h d e n g a n s i n k l i n B e n g k u n g k e a r a h b a r a t d i j u m p a i b e b e r a p a b u k i t g a m p i n g t e r i s o l a s i ( G . P a w o n , G . M a s i g i t d a n P a s i r Bancana) dengan k e m i r i n g a n c e n d e r u n g t e g a k y a n g m e n g i n d i k a s i k a n a d a n y a t e k t o n i k y a n g k o m p l e k s ( K o e s o e m a d i n a t a d a n S i r e g a r , 1 9 8 4 } ( G a m b a r 3 ) .

Hasil dan Pembahasan

Hasil

L o k a s i tltik p e n g a m b i l a n s a m p e l d a p a t d i l i h a t d i G a m b a r 3 . D a t a h a s i l a n a l i s i s k u a n t i t a t i f

nannoplankton d a e r a h p e n e l i t i a n d a p a t d i l i h a t d i T a b e l 1 s e d a n g k a n h a s i l a n a l i s i s b i o s t r a t i g r a f i d e n g a n f o s i l i n d e k s n y a d a p a t d i l i h a t d i T a b e l 2 .

Pembahasan

U r a i a n d i b a w a h i n i h a s i l a n a l i s i s s a t u a n b a t u a n p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a J a w a B a r a t d a r i t u a k e m u d a b e r d a s a r k a n p o s i s i s t r a t i g r a f i m a u p u n zona&l nannoplanktonnya, y a i t u :

1 . S a t u a n B a t u p a s i r K o n g l o m e r a t a n ( S D )

H a s i l a n a l i s i s t e r h a d a p s a m p e l b a t u a n dan s a t u a n b a t u p a s i r t i d a k d i j u m p a i f o s i l nannoplankton ( T a b e l 1 ) . B e r d a s a r k a n h a l t e r s e b u t m a k a p e n e n t u a n u m u r b a t u a n h a n y a d i d a s a r k a n p a d a p o s i s i s t r a t i g r a f i , ciri l i t o l o g i d a n k e s e b a n d i n g a n d e n g a n h a s i l p e n e l i t i a n t e r d a h u l u .

B e r d a s a r k a n p o s i s i s t r a t i g r a f i n y a y a n g b e r a d a d i b a w a h s a t u a n b a t u l e m p u n g b e r u m u r N P 1 9 / 2 0 - N P 2 4 ( E o s e n A k h i r bagian a t a s - O l i g o s e n A k h i r ) ( T a b e l 3 ) , k e m u d i a n c i r i l i t o l o g i b a t u a n n y a y a n g d i s u s u n o l e h b a t u p a s i r d e n g a n l i n g k u n g a n p e n g e n d a p a n f l u v i a t i l m a k a s a t u a n b a t u p a s i r konglomeratan d i d a e r a h R a j a m a n d a l a i n i d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i B a y a h y a n g berumur E o s e n T e n g a h -A k h i r ( M a r t o d j o j o , 1 9 8 4 ) .

2 . S a t u a n B a t u l e m p u n g ( C L )

Secara s t r a t i g r a f i p o s i s i s a t u a n b a t u l e m p u n g i n i b e r a d a d i a t a s s a t u a n b a t u p a s i r k o n g l o m e r a t a n Formast Bayah ( E o s e n T e n g a h - A k h i r ) . K e m u n c u l a n f o s i l i n d e k s p a d a s a t u a n b a t u l e m p u n g bewpa C y c l i c a r g o l i t h u s f l o r i d a n u s y a n g m e m i l i k i k i s a r a n u m u r N P 2 0 - N N 6 ( b a g i a n a t a s d a r i E o s e n A k h i r -M i o s e n T e n g a h ) p a d a C L 1 , C r i b r o c e n t r u m c o e n u r u m y a n g m e m i l i k i k i s a r a n u m u r N P 1 6 - N P 2 4 ( b a g i a n a t a s E o s e n T e n g a h s a m p a i O l i g o s e n A k h i r ) p a d a C L 2 k e m u d i a n C r i b r o c e n t r u m c o e n u r u m d a n C o r o n o c y c l u s n i t e s c e n s p a d a C L 3 y a n g j u g a m e m i l i k i k i s a r a n u m u r N P 1 6 - N P 2 4 ( b a g i a n a t a s E o s e n T e n g a h s a m p a i O l i g o s e n A k h i r ) m e n u n j u k k a n b a h w a s a t u a n b a t u l e m p u n g i n i b e r u m u r N P 1 9 / 2 0 - N P 2 4 ( E o s e n A k h i r - O l i g o s e n A k h i r ) .

B e r d a s a r k a n u r a i a n d i a t a s , s a t u a n b a t u l e m p u n g p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a i n i b i s a d i s e b a n d i n g k a n d e n g a n F o r m a s i B a t u a s i h y a n g b e r u m u r O l i g o s e n A k h i r ( M a r t o d j o j o , 1 9 8 4 ) .

3 . S a t u a n N a p a l ( M A )

S e c a r a s t r a t i g r a f i p o s i s i s a t u a n n a p a l i n i b e r a d a d i a t a s s a t u a n b a t u l e m p u n g b e r u m u r O l i g o s e n A w a l ( F o r m a s i B a t u a s i h ) .

Mikrofasies Batugamping Formasi Batununggal di Daerah Binuang, Kalimantan Selatan 1 8 9

Gambar 3 . Utile lokasi pengambilan sampel berdasarkan peta geologi daerah Padalarang Geological Research Group-ITB ( 2 0 0 9 ) d a l a m Laboratorium Geologi DinamiK ( 2 0 1 1 ) .

Tabel 1 . Data hasil analisis kuantitatif nannoplankton daerah penelitian.

UN

IT L

ITO

LOG

I

\ o

\ u_ \ o

\ Z

\ Z U i \

0- \

i 11 1 1 ^ | I 5 a 3 Q

1 C 2 1 a % til $ $ 1 1 1 i 2 8 8 ^ y .S a s o o cj o r;

B K 1 I I i i 1 l 1 5 s B s S 1 1 |

n

I S 1 -s s S if I 3 5 I I i i ? o | I |

1 1 S 3 S

s & ^ 4 P &

e M 1 s I 1 1 | 2 I 1 i 1 ^

B o n j o n

T i / c x i n

T F

\WkiTTik

ec i i t i 1 2

\WkiTTik \WkiTTik H;:I

S C l S O J i 1 2 1 S C 3 1 2 5 2 s e t s i l i 2 6 1 \ 6 1 1 1 0 WIS ; c 6 2 i ] ID 2 0 6 1 W i 6

S C > 5 C 8

X 10 1 6 : 1 T 5 C l i J C 1 2 s 2 fif; 5 C 1 3 1 3 J \ e, '' 2 ?

V i f u a n N o p a l

M A ' , ! S t ! 1 1 5 : . 6 271) V i f u a n N o p a l

M f t 7 W. 2 V i f u a n N o p a l MA i 27C 2 $ 3 V i f u a n N o p a l

' 2 5 " 2 2 / I S P

u k . a -l i C U t e r r p w l p

C ! 5 0 I t 1 ? a u k . a -l i C U t e r r p w l p n ? 4 3 1

u k . a -l i C U t e r r p w l p

a . 5 > 2 ) 1 J 1 sr> i S D 2

1 9 0 J . G . S . M . V o l . 1 5 No. 4 November 2 0 1 4 h a l . 1 8 5 - 1 9 4

Tabel 2 . Biostratigrafi nannoplankton di daerah penelit ian Rajamandala.

KaiQto

1 9 7 1 U M U R F O S t f . I N D E . K S

D A E R A H P E N E L I T I A N

s a t u o n S a t u a n N a p a l

S a t u a n B a l u p o s i i - B c r f u l e m p u n g T u ' o r n

1 0 -

2 0

2 5 -

3 5 '

4 ^

5 5 -

6 5 -

H f O S E N A K H I R

ranr P L I O S E N

A W A L

-\Cyclicargotithus tloridonus

-^SphenoHftrus f i o f e f o m c v p h u

- i s p r j e . T c / ; t t u s n o ' e r o r n o r p f i u s - ^ S p n & ' i o W i u s c o n j c u s

W25

^ C r t o r o c e n f r u m c o e n u r u m " ^ C o r o n o c y c / u s n i f e s c e n s

3 J G O S H

E E E O S L N

A K H ' K _f C y c / t o n f g o W h u s florlOanus

MP 17

_J Cribrocentrum coenunjm Coronocyclus n t f e s c e n s

T F 7 T

M > ' t )

z

O 3

'5

So

*3

ft

i m j

Mikrofasies Batugamping Formasi Baturwnggal di Daerah Binuang. Kal imantan Selatan 1 9 1

Tabel 3 . Kesebandingan hasil penelit ian biostratigrafi nannoplankton dalam penelit ian ini dengan hasil penelitian biostratigrafi foramini fera kecil dan foiamini fera besar di daerah penelit ian Rajamandala.

A D l N E G O R O , 1 9 7 . 1 A D I N E G O R O , 1 9 7 3 P E N E L I T I A N I N I

5 E R I UMIT LTOLOG

S L O W

> 9 6 9

A S O S I A S i F O R A M K E C I L

R A . I A ^ f t N r > A , l A

BERGGRJ=r 1 9 7 2

A S O S I A S I F O R A M S E S A R R A . I A M A N D A I A 1 9 7 1

A S O S I A S I N A N N O F O S I L

R A J A M A N D A L A H O L O E E M i W

T. i N 2 3

Q V2 U J

Si

TUFA N 2 2

N 2 1 NlM IK

\ / N 2 1

7. < V N 2 0 N?I i s x N 2 0 i ~ N'J ) c

o A N 1 9 J MM 1/ B I / \ J N 1 9

< MK" N N t i 5 \ / N 1 7 O) t - W J 1 t . b Y

N 1 7 O)

t -11.Q

< A I D - A N l 6 M H I D I D - / \

z / \ N 1 5 H N S o N i l

H N S

S

B R E O N 1 2 N N 7

c m. Cyclicargolithus floridanus c M L Cyclicargolithus floridanus 1 5 - O Sphenoliihus heleromorphus

Discoaster deflanderi Discoaster drvgii Discoaster exiiis n N 9 Tf1-2

NtJ 5

Sphenoliihus heleromorphus Discoaster deflanderi Discoaster drvgii Discoaster exiiis

N 8 N N 4

Sphenoliihus heleromorphus Discoaster deflanderi Discoaster drvgii Discoaster exiiis

N 7

N N 4

N 7 NN ,1

2 0 -5 3

N S Cyclicargolithus floridanus Sphenoiithus conicus Sphenoliihus dissimilis

N 5

N N 2 Cyclicargolithus floridanus Sphenoiithus conicus Sphenoliihus dissimilis

Cyclicargolithus floridanus Sphenoiithus conicus Sphenoliihus dissimilis

N 4 Gtoborotatia kugteri Globigerinoides primordius NM 1

? Gtobigerina binsensis Glohorotatia siakeniis

^ / r o c / y p e i j s pleurocentraiis Spirocfypeus tidoengansis 2 & - N 3

Gtobigerina binsensis Glohorotatia siakeniis L a t e T e

^ / r o c / y p e i j s pleurocentraiis Spirocfypeus tidoengansis M " 2 S

0 ^ P 2 2 L a t e T e Spiroclypeus leupoidi

Miogypsinoides dehaarti HRtomsteaina hnmef-nsis z s P 2 1

Spiroclypeus leupoidi Miogypsinoides dehaarti HRtomsteaina hnmef-nsis MP 2 4 z P 2 1

Spiroclypeus leupoidi Miogypsinoides dehaarti HRtomsteaina hnmef-nsis MP 2 4

S i < s P ? 0 7 T d Coronocyclus nitescens Cribocentrum coenurum Cyclicargolithus floridanus

y > o

Q 0 Q z O*"

P 1 9 T d Coronocyclus nitescens

Cribocentrum coenurum Cyclicargolithus floridanus 2 . I G 0 6 C f -

AW\l P 1 8

: m z T c MP 2 1

Coronocyclus nitescens Cribocentrum coenurum Cyclicargolithus floridanus

E O S E N

P 1 8 : m z

T b W 1 M 0

MM T b

P 1 4 KP 17

P 1 4 ? XL 2 W> 14 ?

4 5 . 2 P 1 2

W> 14 4 5 .

2 P 1 2 U i Lll

z P 1 1 T a 3 N P 1 5 l u 1/5 O

1 P 1 0 l u 1/5 O P 1 0

N P H

P 9

N P H

P 9

5 5 - P S T a 2 MP 1 2

S i -w-T a 2 MP "

S i P 6 w i n

T a 1 NP 9

P 4 T a 1

s i P 4

6 s i

P I N P 5

6 5 -

s i

6 5 - PALEOSEt. P 1 N = 2

1 9 2 J .G.S.M. V o l . 1 5 No. 4 November 2 0 1 4 hal . 1 8 5 - 1 9 4

K e m u n c u l a n f o s i l i n d e k s p a d a s a t u a n n a p a l b e r u p a Sphenolithus conicus y a n g m e m i l i k i k'lsaran u m u r N N 1 - N N 3 { M i o s e n A w a l ) p a d a M A I d a n M A 3 P S p h e n o l i t h u s d i s s i m i l i s y a n g m e m i l i k i k i s a r a n u m u r O l i g o s e n s a m p a i M i o s e n A w a l p a d a M A 2 k e m u d i a n Cyclicargolithus floridanus p a d a M A 4 m e n u n j u k k a n b a h w a s a t u a n n a p a l i n i b e r u m u r N N 1 - N N 2 ( O l i g o s e n A k h i r - M i o s e n A w a l ) . M e n u r u t K o e s o e m a d i n a t a d a n S i r e g a r ( 1 9 8 4 ) d a n A d i n e g o r o ( 1 9 7 3 ) , s a t u a n n a p a l i n i d i e n d a p k a n menjarl d e n g a n s a t u a n b a t u g a m p i n g t e r u m b u b e r u m u r O l i g o s e n A k h i r - M i o s e n A w a l . H a s i l p e n e l i t i a n A d i n e g o r o ( 1 9 7 3 ) , m e n u n j u k k a n b a h w a u m u r b i o s t r a t i g r a f i b a t u g a m p i n g t e r u m b u t e r s e b u t s e k i t a r N 3 - N 4 b e r d a s a r k a n z o n a s i f o r a m k e c i l B / o w ( 1 9 6 9 ) a t a u b e r u m u r L a t e Te b e r d a s a r k a n k l a s i f i k a s i h u r u f f o r a m b e s a r B e r g g r e n ( 1 9 7 2 ) ) ( ) ) ( T a b e l 3 ) .

B e r d a s a r k a n u r a i a n d i a t a s , s a t u a n n a p a l p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a i n i b i s a d i s e b a n d i n g k a n d e n g a n A n g g o t a N a p a l F o r m a s i R a j a m a n d a l a b e r u m u r O l i g o s e n a k h i r - M i o s e n A w a l y a n g d i e n d a p k a n m e n j a r i d e n g a n b a t u g a m p i n g terumbu F o r m a s i R a j a m a n d a l a { M a r t o d j o j o , 1 9 8 4 ) .

4 , S a t u a n B a t u p a s i r - B a t u l e m p u n g ( S C )

S e c a r a s t r a t i g r a f i s a t u a n b a t u p a s i r - b a t u l e m p u n g i n i b e r a d a d i a t a s s a t u a n n a p a l y a n g b e r u m u r M i o s e n A w a l ( A n g g o t a N a p a l F o r m a s i R a j a m a n d a l a ) . K e m u n c u l a n f o s i l i n d e k s p a d a s a t u a n b a t u p a s i r -b a t u l e m p u n g b e r u p a Cyclicargolithus floridanus yang m e m i l i k i k i s a r a n u m u r t i d a k l e b i h m u d a d a r i z o n a N N 6 p a d a S C 2 , S p h e n o l i t h u s h e t e r o m o r p h u s y a n g m e m i l i k i kisaran umur N N 4 - N N 5 ( b a g i a n a t a s d a r i A w a l M i o s e n s a m p a i b a g i a n b a w a h M i o s e n T e n g a h ) p a d a S C 3 , k e m u n c u l a n a k h i r d a r i f o s i l i n d e k s Cyclicargolithus floridanus d a n k e h a d i r a n d a r i Discoaster deflandrei, Discoaster drugii d a n Discoaster exi I is p a d a S C 4 y a n g m e n u n j u k k a n t i d a k l e b i h m u d a d a r i z o n a N N 6 , k e m u n c u l a n f o s i l i n d e k s Sphenolithus heteromorphus d a n k e h a d i r a n d a r i Discoaster druggii d a n Discoaster deflandrei yang m e n u n j u k k a n k i s a r a n u m u r N N 4 - N N 5 { b a g i a n a t a s d a r i M i o s e n A w a l s a m p a i bagian b a w a h d a r i M i o s e n T e n g a h ) p a d a S C 6 , k e m u n c u l a n f o s i l i n d e k s Sphenolithus heteromorphus p a d a S C I O d e n g a n k i s a r a n u m u r N N 4 - N N 5 { b a g i a n a t a s d a r i M i o s e n A w a l s a m p a i b a g i a n b a w a h d a r i M i o s e n T e n g a h ) , k e m u n c u l a n f o s i l i n d e k s Cyclicargolithus floridanus pada S C 1 1 y a n g m e n u n j u k k a n t i d a k l e b i h m u d a d a r i z o n a N N 6 ( t i d a k l e b i h m u d a d a r i M i o s e n T e n g a h ) , k e m u n c u l a n d a r i f o s i l i n d e k s Sphenolithus belemnos

p a d a S C 1 2 y a n g m a s u k z o n a N N 1 - N N 3 { b a g i a n b a w a h d a r i M i o s e n A w a l ) k e m u d i a n k e m u n c u l a n a k h i r d a r i f o s i l i n d e k s Cyclicargolithus floridanus p a d a S C 1 3 y a n g m e m i l i k i k i s a r a n h i d u p t i d a k l e b i h m u d a d a r i z o n a N N 6 ( b a g i a n b a w a h d a r i M i o s e n T e n g a h ) m e n u n j u k k a n b a h w a s a t u a n b a t u p a s i r -b a t u l e m p u n g i n i b e r u m u r N N 4 - N N 6 ( M i o s e n A w a l - M i o s e n T e n g a h b a g i a n b a w a h ) .

B e r d a s a r k a n u r a i a n d i a t a s , s a t u a n b a t u p a s i r -b a t u l e m p u n g p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a i n i b i s a d i s e b a n d i n g k a n d e n g a n F o r m a s i C i t a r u m y a n g b e r u m u r M i o s e n A w a l ( M a r t o d j o j o , 1 9 8 4 ) .

5 . S a t u a n B r e k s i V u l k a n i k ( B C )

S e c a r a s t r a t i g r a f i s a t u a n b r e k s i v u l k a n i k i n i b e r a d a d i a t a s s a t u a n b a t u p a s i r - b a t u l e m p u n g y a n g b e r u m u r M i o s e n A w a l ( F o r m a s i C i t a r u m ) . K e h a d i r a n f o s i l i n d e k s p a d a s a t u a n b r e k s i v u l k a n i k b e r u p a Discoaster druggii p a d a B C 1 y a n g m e n u n j u k k a n u m u r t i d a k l e b i h m u d a d a r i z o n a N N 5 m e n u n j u k k a n b a h w a s a t u a n b r e k s i v u l k a n i k i n i b e r u m u r t i d a k l e b i h m u d a d a r i M i o s e n T e n g a h ) . Uasll i n i p u n m e n d u k u n g h a s i l p e n e l i t i a n K o e s o e m a d i n a t a d a n S i r e g a r ( 1 9 8 4 ) y a n g m e n y i m p u l k a n b a h w a s a t u a n b r e k s i v u l k a n i k i n i b e r u m u r N 9 - N 1 3 ( z o n a s i f o r a m i n i f e r a k e c i t B l o w , 1 9 6 9 ) a t a u M i o s e n T e n g a h .

B e r d a s a r k a n u r a i a n d i a t a s m a k a satuan b r e k s i v u l k a n i k d i d a e r a h R a j a m a n d a l a i n i bisa d i s e b a n d i n g k a n d e n g a n F o r m a s i S a g u l i n g y a n g b e r u m u r M i o s e n T e n g a h ( M a r t o d j o j o , 1 9 8 4 d a n K o e s o e m a d i n a t a d a n S i r e g a r , 1 9 8 4 ) .

6 . S a t u a n B a t u a n V u l k a n i k T u f a a n ( T F )

H a s i l a n a l i s i s t e r h a d a p s a m p e l b a t u a n d a r i s a t u a n b a t u a n v u l k a n i k tufa t i d a k d i j u m p a i f o s i l nannoplankton ( T a b e l 1 ) . B e r d a s a r k a n h a l t e r s e b u t m a k a p e n e n t u a n u m u r b a t u a n h a n y a d i d a s a r k a n p a d a p o s i s i s t r a t i g r a f i , c i r i l i t o l o g i d a n k e s e b a n d i n g a n d e n g a n h a s i l p e n e l i t i a n t e r d a h u l u .

B e r d a s a r k a n p o s i s i s t r a t i g r a f i n y a y a n g b e r a d a d i a t a s s a t u a n b r e k s i v u l k a n i k ( F o r m a s i S a g u l i n g ) , k e m u d i a n c i r i l i t o l o g i b a t u a n n y a y a n g d i s u s u n o l e h b a t u a n v u l k a n i k t u f a a n m a k a s a t u a n b a t u a n v u l k a n i k t u f a d i d a e r a h R a j a m a n d a l a i n i d a p a t d i s e b a n d i n g k a n d e n g a n s a t u a n b a t u a n t u f a d a n p r o d u k v u l k a n i k b e r u m u r K u a r t e r ( K o e s o e m a d i n a t a d a n S i r e g a r , 1 9 8 4 ) .

Mikrofasies Batugamping Formasi Batununggal di Daerah Binuang, Kal imantan Selatan 1 9 3

Kesimpulan

B e r d a s a r k a n a n a l i s i s p a l e o n t o l o g i nannoplankton p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a m a k a d a p a t d i s i m p u l k a n s e b a g a i b e r i k u t :

1 . S a t u a n b a t u p a s i r k o n g l o m e r a t a n y a n g b e r a d a d i b a w a h s a t u a n b a t u l e m p u n g b e r u m u r N P 1 9 / 2 0 -N P 2 4 ( E o s e n A k h i r - O l i g o s e n A k h i r ) p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i B a y a h y a n g b e r u m u r E o s e n T e n g a h - A k h i r ( M a r t o d j o j o , 1 9 8 4 ) .

2 . S a t u a n b a t u l e m p u n g b e r u m u r N P 1 9 / 2 0 - N P 2 4 ( E o s e n A k h i r - O l i g o s e n A k h i r ) p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i B a t u a s i h y a n g b e r u m u r O l i g o s e n A k h i r ( M a r t o d j o j o , 1 9 8 4 ) .

3 . S a t u a n n a p a l b e r u m u r N N 1 - N N 2 ( O l i g o s e n A k h i r - M i o s e n A w a l ) p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a d a p a t d i s e b a n d i n g k a n d e n g a n A n g g o t a N a p a l F o r m a s i R a j a m a n d a l a

Acuan

y a n g b e r u m u r O l i g o s e n A k h i r - M i o s e n A w a l ( M a r t o d j o j o , 1 9 8 4 ) .

4 . S a t u a n b a t u p a s i r - b a t u l e m p u n g b e r u m u r N N 4 -N N 6 ( M i o s e n A w a l - M i o s e n T e n g a h b a g i a n b a w a h ) d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i C i t a r u m y a n g b e r u m u r M i o s e n A w a l ( M a r t o d j o j o , 1 9 8 4 ) .

5 . S a t u a n b r e k s i v u l k a n i k b e r u m u r t i d a k l e b i h m u d a d a r i z o n a N N 5 ( t i d a k l e b i h m u d a d a r i M i o s e n T e n g a h ) p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a d a p a t d i s e b a n d i n g k a n d e n g a n F o r m a s i S a g u l i n g y a n g b e r u m u r M i o s e n T e n g a h ( M a r t o d j o j o , 1 9 8 4 d a n K o e s o e m a d i n a t a d a n S i r e g a r , 1 9 8 4 ) .

6 . S a t u a n b a t u a n v u l k a n i k t u f a a n p a d a l o k a s i p e n e l i t i a n d i d a e r a h R a j a m a n d a l a y a n g m e n u t u p i F o r m a s i S a g u l i n g d a p a t d i s e b a n d i n g k a n d e n g a n s a t u a n b a t u a n p r o d u k v u l k a n i k t u f a a n h a s i l e n d a p a n K u a r t e r ( K o e s o e m a d i n a t a d a n S i r e g a r , 1 9 8 4 ) .

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