The discovery of a Paleodictyon-Iike trace fossil from the Late Cambrian Machinchang Formation in Pulau Jemuruk, Langkawi, Malaysia


Author : Mohd Shafeea LemanPublication : Bulletin of the Geological Society of MalaysiaVolume : 46Page : 421-424Year : 2003


Description

Bulletin of the Geological Society of Malaysia, Volume 46, May 2003, pp. 421 - 424

 

The discovery of a Paleodictyon-like trace fossil from the Late Cambrian Machinchang Formation in Pulau Jemuruk, Langkawi, Malaysia

MOHD SHAFEEA LEMAN

School of Environmental Sciences and Natural Resources, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor

 

Abstract: Closely spaced polygonal Paleodictyon-like trace fossil was recently discovered in Late Cambrian Machinchang Formation at Pulau Jemuruk, Langkawi. Each polygon is bounded by six segments of ridges forming unique hexagonal framework. The Jemuruk fossil has an epi-relief origin, contrary to the hypo-relief burrow Paleodictyon. The Jemuruk trace fossils formed in relatively shallower marine environment compared with other known Paleodictyon. This study shows that the Kinneyia structure found in the same layer originated from these Paleodictyon-like trace fossils.

 

Abstrak: Surihan berbentuk poligon menyerupai Paleodictyon telah ditemui dalam batuan Kambria Akhir Formasi Machinchang di Pulau Jemuruk, Langkawi. Setiap ruang fosil surih ini disempadani enam segmen permatang membentuk kerangka heksagon yang menarik. Fosil Jemuruk berasalan epi-jasatimbul manakala Paleodictyon adalah sejenis korekan hipo-jasatimbul. Fosil surih Jemuruk terbentuk pada sekitaran laut lebih cetek berbanding dengan Paleodictyon yang diketahui. Kajian juga menunjukkan bahawa struktur Kinneyia yang ditemui dalam lapisan yang sama adalah berasal daripada fosil surih seakan Paleodictyon ini.