Bulletin of the Geological Society of Malaysia, Volume 52, June 2006, pp. 27 – 33

Some Deep Water Middle Triassic Foraminifera from the Semanggol Formation

Basir Jasin

Pusat Pengajian Sains Sekitaran dan Sumber Alam, Universiti Kebangsaan Malaysia

Abstract: Eight benthic foraminiferal taxa were retrieved from siliceous mudstone samples collected from the Semanggol Formation at Bukit Lada and Merbau Pulas. The foraminifera consist of Pseudonodosaria densa, Pseudonodosaria lata, Psuedonodosaria obconica, Pseudonodosaria simpsonensis, Prodentalina sp A, Prodentalina sp B, Cryptoseptida sp., and Protonodosaria spp. The assemblage indicates that the depositional environment was a deep marine basin above the calcite compensation depth.

Abstrak: Lapan taksa foraminifera bentos telah didapatkan semula daripada sampel batu lumpur bersilika yang dikutip dari Formasi Semanggol yang tersingkap di Bukit Lada dan Merbau Pulas. Foraminifera terdiri daripada Pseudonodosaria densa, Pseudonodosaria lata, Psuedonodosaria obconica, Pseudonodosaria simpsonensis, Prodentalina sp A, Prodentalina sp. B., Cryptoseptida sp., dan Protonodosaria spp. Himpunan ini menunjukkan sekitaran pengendapannya merupakan sekitaran lembangan samudera dalam di atas kedalaman pampasan kalsit.

https://doi.org/10.7186/bgsm52200604