Warta Geologi Volume 21, No 4, Jul-Aug 1995
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Jil. 21, No.4 (Vol. 21, No.4) Jul-Aug 1995 . KANDUNGAN (Contents) ..............................................................................@e;I~I~N~g · ~~@~!(~gg!ggJAgINQt~§).....................................................................................................................................:.:.:.: ... :..... :.:.:.: ... :... :.:.:.:.:.:.:.:.:.:.:.:.:..<·.i .., " .••.••.•i •.·••.·" .•• .• i.••.•i. ••·..i. •.•.•. i .•.i .•.i .•.•.•. i .• .•• .•· .•.•.•.•.i.•. i .•.i .•.•.•. i· .••. ..•.i•·.•...i .•.•. • .•.•.• •...i· .••. •.•.i.• .i.•.i .•.•.• • .•· .• .•.•.i .•.i .•.i .•.i. •.i .•. .•.. •.. .•· .•.i .•.i· .••.• •. .. •• Basir Jasin, Sanudin Tahir and Zaidi Harun: Some Mi ocene planktonic foraminifera from 241 Bidu-Bidu area, Sabah Umar Hamzah dan Ng Chiang Seng: Fosil kayu dan beberapa fosil tumbuhan dari Sg. Berok, 247 Gua Musang, Kelantan ...................................................................... ' ........................................................................................................................... ;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;. .. :.:.. ..... Andy Scott Gale: Evolution of Starfish: a success story 255 John Milson: University of London gravity work in Southeast Asia 256 Ibrahim Komoo, Che Aziz Ali, Kamal Roslan Mohamed, Juhari Mat Akhir dan Felix Tongkul: 257 EIA Bakun: Aspek geologi dan hidrogeologi Varavirdh Suteethorn and Jean-Jacques Jaeger: Vertebrate fossil s in the terrestrial 259 Mesozoic and Cainozoic of Thailand Keahlian (Membership) 261 Pertukaran Alamat (Change of Address) 262 Current Address Wanted 262 Pertambahan Baru Perpustakaan (New Library Additions) 262 Warta Geologi 21(3) Pembetulan (Correction) 263 Petroleum Geology Conference '95 - First Circular 264 Second Malaysian Geology Photographic Competition 265 Local News 269 Press Release - Geological Reports on Industrial Minerals 272 Senarai Tesis SmSn Semester II, Sesi 1994/95, Jabatan Geologi, UKM 272 Senarai Tesis/Laporan Projek Tahun Akhir Sesi 1994/95, Jabatan Geologi, UM 273 Seminar Geologi Abad Ke-21 : Cabaran dan Peluang 275 Biogeography and Geological Evolution ofSE Asia 277 Metal Bulletin's 4th International Tin Conference 279 AAPG/SEPM Annual Convention 280 ACXRI '96 281 Shell Malaysia - Positions vacant 283 Kalendar (Calendar) 285 Majlis (Council) 1995/96 Presiden (President) KhalidNgah Naib Presiden (Vice-President) Ibrahim Komoo Setiausaha (Secretary) Ahmad Tajuddin Ibrahim Penolong Setiausaha (Asst. SecretaIy) Nik Ramli Nik Hassan Bendahari (Treasurer) Lee Chai Peng Pengarang (Editor) Teh Guan Hoe Presiden Yang Dahulu (Immediate Past President) : FatehChand 1995-97 1995-96 Khoo Kay Khean Abd. Ghani Mohd Rafek Hoh Swee Chee Abdul Rahim Samsudin Ibrahim Abdullah Effendy Cheng Abdullah Mohd Shafeea Leman Tan Boon Kong , Jawatankuasa Kecil Pengarang (Editorial Subcommittee) I Teh Guan Hoe (PengerusilChairman) Fan Ah Kwai Ng Tham Fatt J.J. Pereira Lembaga Penasihat Pengarang (Editorial Advisory Board) AwPeckChin FooWahYang Mazlan Madon P.H. Stauffer Azhar Hj. Hussin C.A. Foss Ian Metcalfe Tan Boon Kong K.R. Chakraborty N.S. Haile S. Paramananthan Tan Teong Hing Choo Mun Keong C.S. Hutchison John Kuna Raj Teoh Lay Hock Chu Leng Heng Lee Chai Peng Senathi Rajah H.D. Tjia Denis N.K. Tan Leong Lap Sau Shu Yeoh Khoon Yeap Cheng Hock The Society was founded in 1967 with the aim of promoting the advancement of earth sciences particularly-in Malaysia and the Southeast Asian region. The Society has a membership of about 600 earth scientists interested in Malaysia and other Southeast Asian regions. The membership is worldwide in distribution. Published by the Geological Society of Malaysia. Department of Geology. University of Malaya. 59100 Kuala lumpur. Tel: 603-757 7036 Fax: 603-756 3900 Printed by M Printing Works Sdn. Bhd.. 29 Jolon Riong. 59100 Kuala Lumpur. Some Miocene planktonic foraminifera from Bidu-Bidu area, Sabah BASIR JASIN\ SANUDIN TAHIR2 AND ZAIDI HARUN2 1Department of Geology UKl\1, Bangi Selangor 2Department of Earth Sciences UKl\1, Sabah Abstract: Two assemblages of planktonic foraminifera were identified from the Garinono Formation in the Bidu-Bidu area. The older assemblage retrieved from the mudstone matrix of the chaotic deposits consists of Globigerinoides trilobus, Globigerinoides diminutus, Globigerinoides bisphericus, Praeorbulina sicana, Globoquadrina baroemoenensis, Dentoglobigerina altispira altispira and Dentoglobigerina altispiraglobosa. This assemblage is indicative oflate Early Miocene age. The younger assemblage retrieved from the tuffaceous mudstone bed comprises Globigerinoides trilobus, Globigerinoides immaturus, Globigerina woodi, Orbulina universa, Orbulina suturalis ,Dentoglobigerina altispira altispira, Globorotalia pseudoscitula, Globorotalia fohsi peripheroacuta and Sphaeroidinellopsis disjuncta indica tive of early Middle Miocene age. INTRODUCTION GEOLOGICAL SETTING Bidu-Bidu area has been Illapped by The geology of the Bidu-Bidu area is Newton-SIllith (1967). The area consists of cOIllplex. The relationships aIllong the rock Chert-spilite ForIllation, ultrabasic rocks, basic units are not fully understood. We will restrict rocks, Garinono ForIllation and KaIllansi Beds. our discussion on the Garinono ForIllation only. Most of the geological inforIllation were obtained The Garinono ForIllation is a chaotic deposit froIll liIllited outcrops exposed in the river. cOIllposed of rock fragIllents of various sizes Construction of a new road in the area has and blocks of sandstone, liIllestone, chert, basalt, exposed several good outcrops in the area. A serpentinite and gabbro eIllbedded in a Illudstone road-cut at Sungai Kibut area (Fig. 1) exposes Illatrix. This fOrIllation is a sediIllentary Illelange two rock units. The lower unit consists of (debris flow deposit). Lee (1970) extended the sediIllentary Illelange which was included in Garinono ForIllation to include the well bedded the Garinono ForIllation (Newton-SIllith, 1967). tuffaceous Illudstone, tuff and tuffite. The The upper unit is cOIllposed of interbedded Garinono FOrIllation is equivalent to the KuaIllut tuffaceous Illudstone and sandstone showing and Ayer ForIllations. The contact between thickening upward sequence. This rock the Illelange and the well bedded Illudstone association was included in the KaIllansi Beds sandstone sequence is exposed at an outcrop by Newton-SIllith (1967). Lee (1970) observed near Sungai Kibut. The sandstone blocks of the saIlle rock association in the Sandakan the Illelange exhibit SIUIllP folds and is overlain Peninsula and he included both units into the by the well bedded tuffaceous Illudstone Garinono ForIllation. The Illatrix of the sandstone sequence. The contact appears like sediIllentary Illelange and the lower tuffaceous an unconforIllity but there is no erosional feature Illudstone bed yielded SOIlle identifiable observed. planktonic foraIllinifera. ISSN 0126-5539 Warta Geologi, Vol. 21, No.4, Jul-Aug 1995, pp. 241-246 242 BASIR JASIN, 8ANUDIN TAHIR AND ZAIDI HARUN .----- N LOCATION MAP SOkm "Uda~'" ) SCALE Kola ) Kinabal .. ................. .. , .' 5.0 km ® Sample location __ Road ,..c River - ::r: \ :J "'0 iIi I :J "'0 r( iIi C III .II: -gIII III CI) 5° 47'N ~----------------~------------------~~--------------~~------~ 117°11'E 117°23'E Figure 1. Map ofBidu-Bidu area showing sample locality. Plate 1. 1,2. Globigerinoides immatllrllS LeRoy (Scale bar = 200 /lm) (1. Umbilical view, 2. Spiral view). 3,4. Globigerinoides trilobus (Reuss) (Scale bar = 100 /lm) (3. Umbilical view, 4. Spiral view). 5,6. Globigerinoides diminutus Bolli (Scale bar = 100 /lm) (5. Umbilical view, 6. Spiral view). 7. Globigerinoides bispherieus Todd (Scale bar = 200 /lm). 8. Praeorbulina sieana (Blow) (Scale bar = 200 /lm). 9,10. Globigerina woodi Jenkins (Scale bar = 100 /.lm) (9. Apertural view, 10. Spiral view). 11. Orbulina universa d'Orbigny (Scale bar = 200 /.lm). 12. Orbulina suturalis Bronnimann (Scale bar = 200 /lm). 13,14. Globoquadrina baroemoenensis (LeRoy) (Scale bar = 100 /lm) (13. Apertural view, 14. Spiral view). Warta Geologi, Vol. 21, No.4, JuI-Aug 1995 ______ - f''- 246 BASIR JASIN, SANUDIN TAHIR AND ZAIDI HARUN The occurrence of Middle Miocene assemblage from the tuffaceous mudstone is planktonic foraminifera in tuffaceous mudstone indicative of early Middle Miocene. During in Sabah has been reported in many areas, the Middle Miocene the volcanic activities were namely, the Libong Tuffite Formation (Basir very intensive and the tuffaceous material was Jasin and Sanudin Tahir, 1987), the top of widely distributed in eastern Sabah. Garinono Formation (Lee, 1970), the top of Kuamut Formation, top of Ayer Formation, REFERENCES the Tabanak Conglomerate Formation (Leong, BASIR JASIN AND SANUDIN TAHIR, 1987. Middle Miocene 1974), and Tungku Formation (Haile and Wong, Planktonic foraminifera from the Libong Tuffite 1965). This indicates that the volcanic eruptions Formation, Sabah. Sains Malaysiana, 16(1),85- were very active during early Middle Miocene 95. time. These volcanic eruptions might have HAILE, N .S. AND WONG, N .P.Y., 1965. The geology and triggered the formation of chaotic deposits of mineral resources of Dent Peninsula, Sabah. the Garinono, Kuamut, and Ayer Formations Geological SurlJey Borneo region, Malaysia memoir and followed later by the deposition of volcanic 16,1-199. ash and tuffs. LEE, D.T.C., 1970. Sandakan Peninsula, eastern Sabah, East Malaysia explanation ofsheet 6/117/16,6/118/ CONCLUSION 13, 5/117/4, and 5/118/1. Geological