Bryozoan distribution and growth form associations as a tool in environmental interpretation, Tasmania, Australia
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- 作者：Amini ; Zahra Z. ; Adabi ; Mohammad H. ; Burrett ; Clive F. ; Quilty ; Patrick G.
- 关键词：Bryozoan distribution ; Growth form association ; Environmental interpretation ; Cool water carbonates ; Tasmania ; Australia
- 刊名：Sedimentary Geology
- 出版年：2004
- 出版时间：May 1, 2004
- 年：2004
- 卷：167
- 期：1-2
- 页码：1-15
- 全文大小：2.04 M
文摘
The cool temperate carbonate sediments of eastern and western Tasmania and Bass Strait composed of 29–50 % of bryozoan skeletal grains. Two hundred and eighty three bryozoan bulk sediments around Tasmania were studied to determine the relationship between bryozoan zoarial growth form association and their depth zone. Bryozoans skeletons are grouped into 11 morphotypes according to architecture and style of disarticulation/fragmentation. Encrusting forms, erect flexible (cellariiform) and erect-rigid-robust-branching (adeoniform) cheilostomes are consistently the most widespread, with delicate branching cyclostomes the next most common. Growth form associations were grouped into four depth-related settings: strand line, shallow shelf, middle shelf and deep shelf. This study demonstrates that bryozoan morphotype associations, occupying different depth zones, are valuable for providing fundamental (paleo-) environmental information. Morphotype associations are related mainly to water depth, water energy, sedimentation rate and substrate.