Ordovician sponge spicules from New South Wales, Australia

B. D. Webby, J. Trotter

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

An abundant, varied, and well-preserved assemblage of discrete sponge spicules of late Ordovician age is described from the Malongulli Formation of central New South Wales. It is associated with one of the most diverse Ordovician siliceous sponge faunas known. The assemblage occurs in allochthonous limestone blocks within breccia deposits of a predominantly graptolitic and spiculitic siltstone succession, and is composed mainly of hexactinellid spicule types. Included are a number of distinctive forms, recognized as new taxa. A wide variety of other diagnostic, but more generalized, spicule types also occurs, including stauractines, pinnular and nonpinnular pentactines and hexactines, ornamented oxyhexasters and echinhexasters, clavules, anchorate root-tufts, and uncinates. The sponges, discrete spicules, and radiolarians of these limestone clasts were transported in debris flows to a basinal setting from peri-platform oozes that formed on the flanks of the shallow offshore island-arc platform of the Molong High. -from Authors

Original languageEnglish
Pages (from-to)28-41
Number of pages14
JournalJournal of Paleontology
Volume67
Issue number1
DOIs
Publication statusPublished - 1 Jan 1993
Externally publishedYes

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spicule
sponge
Ordovician
limestone
new taxon
siltstone
breccia
debris flow
clast
island arc
fauna

Cite this

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Ordovician sponge spicules from New South Wales, Australia. / Webby, B. D.; Trotter, J.

In: Journal of Paleontology, Vol. 67, No. 1, 01.01.1993, p. 28-41.

Research output: Contribution to journalArticle

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