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首页> 外文期刊>PALAIOS >Taphonomic Signatures On Modern Caribbean Bivalve Shells As Indicators Of Environmental Conditions (Belize, Central America)
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Taphonomic Signatures On Modern Caribbean Bivalve Shells As Indicators Of Environmental Conditions (Belize, Central America)

机译:现代加勒比双壳类贝壳上的音标签名作为环境状况的指标(中美洲伯利兹)

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摘要

Taphonomic signatures on modern bivalve shells, such as traces of drilling organisms, encrusters, fragmentation, and abrasion function as indicators of environmental differences on Belize atoll reefs. Glovers Reef, Lighthouse Reef, and Turneffe Islands are three adjacent Caribbean atolls showing variations in geomorphology, lagoonal depth, sedimentation, mangrove growth, sea-grass cover, and exposure to winds and currents, as well as differences in their lagoonal development and age. A variety of bivalve assemblages characterize lagoonal subenvironments and also mirror the above-mentioned environmental variations. Taphonomic signatures, such as shell-size distribution, disarticulation, sorting, boring traces, encrustations, fragmentation, and abrasion, were identified on bivalve shells from a total of 111 surface sediment samples. Shell-size distribution and sorting of right and left valves indicate in situ deposition of populations on each atoll. Increasing residence times of shells on the sediment surface due to decreasing sedimentation rates from Turneffe Islands to Lighthouse Reef to Glovers Reef cause an increase in taphonomic shell signatures.
机译:现代双壳贝壳上的速写特征,例如钻井生物的痕迹 ,结壳,破碎和磨损 充当伯利兹 三角洲环境差异的指标礁石。格洛弗斯礁,灯塔礁和特内菲岛 是三个相邻的加勒比环礁,显示出地貌, 泻湖深度,沉积,红树林生长,海草覆盖, < / sup>以及暴露于风和海流中,以及 泻湖发育和年龄的差异。各种各样的双壳类动物组合 表征了泻湖亚环境,也反映了上述 环境的变化。在双瓣壳 上识别了拼写特征,例如壳大小 分布,分离,排序,无聊的痕迹,结皮, 碎裂和磨损。从总共111个表面沉积物样本中提取。壳大小分布 以及右阀和左阀的排序指示每个环礁上种群的原位沉积 。由于从特内菲岛到灯塔礁再到格罗弗礁 的沉降速率的降低,沉积物中 壳在沉积物表面的停留时间增加,导致完整的壳层增加签名。

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  • 来源
    《PALAIOS》 |2008年第9期|586-600|共15页
  • 作者单位

    Johann Wolfgang Goethe-Universit?t, Institut für Geowissenschaften, Facheinheit Pal?ontologie, Altenh?ferallee 1, 60438 Frankfurt am Main, Germany il.hauser@em.uni-frankfurt.de;

    Johann Wolfgang Goethe-Universit?t, Institut für Geowissenschaften, Facheinheit Pal?ontologie, Altenh?ferallee 1, 60438 Frankfurt am Main, Germany il.hauser@em.uni-frankfurt.de;

    Johann Wolfgang Goethe-Universit?t, Institut für Geowissenschaften, Facheinheit Pal?ontologie, Altenh?ferallee 1, 60438 Frankfurt am Main, Germany il.hauser@em.uni-frankfurt.de;

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