Sains Malaysiana 47(10)(2018): 2251–2258

http://dx.doi.org/10.17576/jsm-2018-4710-02

 

Pengelasan Litostratigrafi Baru untuk Formasi Singa di Langkawi, Kedah, Malaysia

(New Classification for Lithostratigraphy of the Singa Formation in Langkawi, Kedah, Malaysia)

 

MOHAMAD HANIF KAMAL ROSLAN¹, CHE AZIZ ALI^1,2 & KAMAL ROSLAN MOHAMED^1,2*

 

¹Pusat Penyelidikan Langkawi, Institut Alam Sekitar dan Pembangunan (LESTARI), Universiti Kebangsaan Malaysia, 46300 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

²Pusat Pengajian Sains Sekitaran & Sumber Alam, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 46300 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

Received: 27 March 2018/Accepted: 8 June 2018

 

ABSTRAK

Semakan semula litostratigrafi Formasi Singa dilakukan berdasarkan data-data baru yang diperoleh melalui kajian terbaru. Secara umumnya, Formasi Singa dominan dengan batu lumpur hitam yang berselang lapis dengan batu pasir nipis hingga sederhana tebal serta sedikit lapisan konglomerat. Kajian melibatkan analisis terhadap beberapa log sedimen yang telah direkodkan di lapangan. Kesemua log sedimen tersebut telah dikorelasikan untuk mendapatkan satu log komposit yang mewakili keseluruhan Formasi Singa. Berdasarkan kajian terperinci korelasi litologi yang dilakukan, cadangan litostratigrafi baru Formasi Singa mengandungi empat ahli iaitu Ahli Kentut, Ahli Ular, Ahli Selang dan Ahli Lembung. Ahli Kentut merupakan ahli yang paling tua diikuti dengan Ahli Ular, Ahli Selang dan Ahli Lembung. Ahli Ular di dalam Formasi Singa dianggap sebagai satu unit kekanta antara Ahli Kentut dengan Ahli Selang. Beberapa siri perubahan paras laut ditafsirkan sepanjang pengendapan batuan Formasi Singa dipercayai akibat daripada proses pencairan glasier yang menyebabkan paras laut meningkat dan pengendapan berterusan yang menyebabkan lembangan menjadi cetek dan paras laut menjadi rendah.

 

Kata kunci: Formasi Singa; geologi Langkawi; stratigrafi

 

 

ABSTRACT

A review of lithostratigraphy of the Singa Formation is based on new data, which was obtained through the latest study conducted. Generally, Singa Formation is dominant with black mud stones, which are interbedded with medium to thick sandstone and some conglomerate layers. The study involved analysis of some sedimentary logs that were recorded in the field. All sedimentary logs were then correlated to get a composite log that represents the entire sequence of the Singa Formation. Based on detail study of lithologic correlation, a new lithostratigraphy of the Singa Formation which consists of four members, namely Kentut Member, Ular Member, Selang Member and Lembung Member is proposed. Kentut Member is the oldest member while Lembung Member is the youngest member. Ular Member was considered as the lenses between Kentut and Selang Member. A series of sea level changes were interpreted throughout the deposition of Singa Formation that are believe due to the melting of glacier that cause the sea level to rise and continuous deposition of sediment that cause the basin to become shallow and lowering the lea level.

 

Keywords: Geology of Langkawi; Singa Formation; stratigraphy

REFERENCES

 

Ahmad Jantan. 1973. Stratigraphy of the Singa Formation (Upper Paleozoic) in the Southwestern part of Langkawi Island Group, West Malaysia. Tesis Sarjana Sains. Universiti Malaya (tidak diterbitkan).

Gobbett, D.J. 1972. Geology of the Rebak Islands, Langkawi, West Malaysia. Geological Society of Malaysia Newsletter 37: 1-5.

Hamada, T. 1968. Ambocoeliids from Red Beds in the Malaysan Peninsula. Dlm. Geology and Palaeontology of Southeast Asia. 5, disunting oleh Kobayashi, T. & Toriyama, R. Tokyo: The University of Tokyo Press. pp. 13-25.

Hamada, T. 1969. Late Palaeozoic brachiopods from red beds in the Malayan Peninsula. Dlm. Geology and Palaeontology of Southeast Asia 6, disunting oleh Kobayashi, T. & Toriyama, R. Tokyo: The University of Tokyo Press. pp. 251-264.

Ibrahim Abdullah. 1997. Evolusi struktur Kepulauan Langkawi. Warisan Geologi Malaysia – Pemuliharaan untuk Ekopelancongan. Bangi: Institut Alam dan Pembangunan (LESTARI). pp. 119-134.

Jones, C.R. 1966. Peta Geologi Kepulauan Langkawi. Helaian 150. Skala 1 : 63,360. Kuala Lumpur: Jabatan Penyiasatan Kajibumi Malaysia.

Jones, C.R. 1981. Geology of Perlis, North Kedah and the Langkawi Islands. Geological Survey of Malaysia District Memoir 17.

Khoo, T.T. 1984. Evidence of poly metamorphism in the Rebak Islands, Langkawi, Kedah. Bulletin of the Geological Society of Malaysia 17: 265-281.

Kobayashi, T. & Hamada, T. 1973. Cyrtosymbolids (Tribolita) from the Langgun Red Beds in Northwest Malaya, Malaysia. Geology and Palaeontology of Southeast Asia 12. Tokyo: The University of Tokyo Press. pp. 1-26.

Koopmans, B.N. 1965. Structural evidence for a Paleozoic orogeny in north-west Malaya. Geological Magazine 102(6): 501-520.

Leonova, T.B., Mohd. Shafeea Leman & Shi, G.R. 1999. Discovery of an Early Permian (Late Sakmarian) ammonoid form Langkawi Island, Malaysia. Alcheringa 23: 277-281.

Mat Niza Abdul Rahman, Hamid Ariffin, Mohamad Hussein Jamaluddin & Imsamut, S. 2014. Lithostratigraphic correlation of the Rebak/Khuan Klang Formation along the Malaysia-Thailand border area. Proceeding National Geoscience Conference 2014. pp. 199-201.

Mohamad Hanif Kamal Roslan, Che Aziz Ali & Kamal Roslan Mohamed. 2016. Fasies dan sekitaran sedimen Formasi Singa di Langkawi, Malaysia. Sains Malaysiana 45(12): 1897-1904.

Mohamad Hanif Kamal Roslan, Che Aziz Ali, Kamal Roslan Mohamed & Mohd. Shafeea Leman. 2017. Taburan fosil dan penilaian semula usia Formasi Singa di Langkawi, Kedah Darul Aman, Malaysia. Sains Malaysiana 46(12): 2359-2365.

Mohd Shafeea Leman. 2003. An Early Permian (Early Sakmarian) brachiopod fauna from the Sungai Itau Quarry and its relationship to other Early Permian brachiopod horizon in Langkawi, Malaysia. Bulletin of the Geological Society of Malaysia 46: 155-160.

Mohd Shafeea Leman. 1997a. Batuan formasi singa di Pulau Langkawi. Dlm. Warisan Geologi Malaysia - Pemuliharaan untuk Ekopelancongan, disunting oleh Ibrahim Komoo, Mohd Shafeea Leman, Kadderi Md Desa & Ibrahim Abdullah. Bangi: Institut Alam dan Pembengunan (LESTARI). pp. 185-207.

Mohd Shafeea Leman. 1997b. The age and paleobiogeography of brachiopod fauna discovered in pebbly mudstone at Kilim, Langkawi. Bulletin of the Geological Society of Malaysia 40: 233-240.

Mohd Shafeea Leman. 1996. The occurrences of brachiopods from pebbly mudstone near Kilim, Langkawi: Their age, paleobiogeography and paleoclimatic implication. Warta Geologi 22(2): 100-102.

Sarkar, S.S. 1972. On the Posidonia from Rebak Islands Langkawi, West Malaysia. Geological Society of Malaysia Newsletter 37: 5-9.

Shi, G.R., Mohd. Shafeea Leman & Tan, B.K. 1997. Early Permian brachiopods from the Singa Formation of Langkawi Island, northwestern Peninsular Malaysia: Biostratigraphical and biogeographical implications. The International Conference on Stratigraphy and Tectonic Evolution of Southeast Asia and the South Pacific. pp. 62-72.

Yancey, T.E. 1972. Devonian fossils from Pulau Rebak Besar, Langkawi Island, West Malaysia. Geological Society of Malaysia Newsletter 37: 10-12.

 

 

*Corresponding author; email: kamal@ukm.edu.my