Brachiopods associated with stromatoporoid mounds from the Middle to Upper Ordovician Cashions Creek Limestone, Tasmania

TY - CHAP

T1 - Brachiopods associated with stromatoporoid mounds from the Middle to Upper Ordovician Cashions Creek Limestone, Tasmania

AU - Jakobsen, Kristian Grube

AU - Brock, Glenn

AU - Nielsen, Arne Thorshøj

AU - Mathieson, David K.

AU - Harper, David Alexander Taylor

PY - 2014

Y1 - 2014

N2 - Stromatoporoid mounds and inter-mound carbonates in the upper part of the Darriwilian to Sandbian (Middle-Upper Ordovician) Cashions Creek Limestone in the Florentine Valley, southwest-central Tasmania were sampled in order to document the benthic macrofauna and investigate whether the stromatoporoid mounds had a higher brachiopod biodiversity. The brachiopod assemblage is characterised by Lepidomena with a relative abundance of about 55% of the fauna. Lepidomena fortimuscula and Lepidomena pulchra represent the key brachiopod species. The brachiopod diversity recorded is higher in the inter-mound than on the mound. Other macrofossil groups, including bivalves, rostroconchs, cephalopods, bryozoans, gastropods and echinoderms are characterised by low diversity. Gastropods and brachiopods are the main encrusting organisms on the mounds, with encrusting bivalves and rostroconchs a minor component. The fauna is interpreted to have existed in a shallow marine, high energy depositional environment.

AB - Stromatoporoid mounds and inter-mound carbonates in the upper part of the Darriwilian to Sandbian (Middle-Upper Ordovician) Cashions Creek Limestone in the Florentine Valley, southwest-central Tasmania were sampled in order to document the benthic macrofauna and investigate whether the stromatoporoid mounds had a higher brachiopod biodiversity. The brachiopod assemblage is characterised by Lepidomena with a relative abundance of about 55% of the fauna. Lepidomena fortimuscula and Lepidomena pulchra represent the key brachiopod species. The brachiopod diversity recorded is higher in the inter-mound than on the mound. Other macrofossil groups, including bivalves, rostroconchs, cephalopods, bryozoans, gastropods and echinoderms are characterised by low diversity. Gastropods and brachiopods are the main encrusting organisms on the mounds, with encrusting bivalves and rostroconchs a minor component. The fauna is interpreted to have existed in a shallow marine, high energy depositional environment.

M3 - Book chapter

SN - 9780949466433

T3 - Association of Australasian Palaeontologists. Memoirs

SP - 249

EP - 265

BT - Cambro-Ordovician Studies V

A2 - Laurie, John R.

A2 - Paterson, John R.

A2 - Brock, Glenn A.

PB - Geological Society of Australia

ER -