Sains Malaysiana 46(12)(2017): 2359–2365

http://dx.doi.org/10.17576/jsm-2017-4612-12

Taburan Fosil dan Penilaian Semula Usia Formasi Singa di Langkawi, Kedah Darul Aman, Malaysia

(Fossils Distribution and Reevaluation of the Age of Singa Formation in Langkawi, Kedah Darul Aman, Malaysia)

MOHAMAD HANIF KAMAL ROSLAN¹, CHE AZIZ ALI², KAMAL ROSLAN MOHAMED^2*

& MOHD SHAFEEA LEMAN²

¹Pusat Penyelidikan Langkawi, Institut Alam Sekitar dan Pembangunan (LESTARI)

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

²Pusat Pengajian Sains Sekitaran & Sumber Alam, Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

Diserahkan: 5 Jun 2017/Diterima: 26 Oktober 2017

ABSTRAK

Formasi Singa yang tersingkap di Kepulauan Langkawi terdiri daripada jujukan batuan sedimen argilit dan boleh dibahagikan kepada empat ahli iaitu Rebak, Kentut, Ular dan Selang. Formasi Singa kaya dengan fosil terutamanya daripada jenis brakiopod, bryozoa dan bivalvia yang boleh ditemui dalam Ahli Rebak dan Ahli Selang. Fosil yang ditemui semasa kajian dijalankan serta fosil yang pernah dilaporkan oleh penyelidik terdahulu telah dibuat penelitian semula untuk menentukan usia Formasi Singa dengan lebih tepat. Himpunan fosil Formasi Singa boleh dibahagikan kepada tiga julat usia, iaitu Visean, Asselian Akhir - Sakmarian Awal dan Sakmarian Akhir. Jujukan berusia Visean diwakili oleh Ahli Rebak, manakala jujukan Asselian Akhir - Sakmarian Awal dan jujukan Sakmarian Akhir diwakili oleh Ahli Selang. Dalam Ahli Ular dan Ahli Kentut tidak ditemui sebarang fosil. Keputusan daripada kertas ini memerlukan satu kajian semula dijalankan terhadap litostratigrafi Formasi Singa.

Kata kunci: Formasi Singa; fosil Paleozoik; geologi Langkawi

ABSTRACT

Singa Formation exposed in Langkawi Archipelago consists of an argillaceous sequence that had been divided into four members namely; Rebak, Kentut, Ular and Selang. Fossils in the Singa Formation, include brachiopod, bryozoans and bivalves have been found in Rebak and Selang Members. The fossils that were found from this study and by previous researchers have been reviewed in order to determine the age of the Singa Formation more precisely. The fossils can be assigned to three age ranges: Namely Visean, Late Asselian - Early Sakmarian dan Late Sakmarian. The Visean fossils are concentrated in Rebak Member, while the Late Asselian - Early Sakmarian and Late Sakmarian fossils occurred in Selang Member. Both Ular and Kentut Members do not contain any fossil. The finding of this paper require a review of lithostratigraphy of the Singa Formation.

Keywords: Geology of Langkawi; Palaeozoic fossil; Singa Formation.

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*Pengarang untuk surat-menyurat; email: kamal@ukm.edu.my