New Late Eocene mollusks from localized limestone deposits formed by subduction-related methane seeps, southwestern Washington
New Late Eocene mollusks from localized limestone deposits formed by subduction-related methane seeps, southwestern Washington
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来自华盛顿西南部与俯冲有关的甲烷渗漏形成的局部石灰岩沉积物的新始新世晚期软体动物
DOI：
10.1017/s0022336000030389
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发表时间：
1991
影响因子：
1.4
通讯作者：
J. Goedert
中科院分区：
文献类型：
--
作者：
R. Squires;J. Goedert
棘轮类古腹足类Margarites(Pupillaria)Columbiana n.sp.、双壳类Mytild双壳Modiolus(Modiolus)will apaensis n.sp.和泡囊类双壳类Calytogena chinookensis n.sp.是从已知的与俯冲相关的甲烷渗漏相关的最早化石群落中描述的。这些群落位于华盛顿西南边缘的中晚期至始新世晚期的非常局部化的石灰岩中。这些石灰岩中含有大量的化学合成双壳类和蠕虫管，以及其他大型底栖生物，它们沿着一个古老的俯冲带复合体的陆地斜坡，在低温甲烷渗漏附近定居。Calytogena chinookensis n.sp.是该属已知最早的种，已知时间为中新世至近代。
The trochid archaeogastropod Margarites (Pupillaria) columbiana n. sp., the mytilid bivalve Modiolus (Modiolus) willapaensis n. sp., and the vesicomyid bivalve Calyptogena chinookensis n. sp. are described from the earliest known fossil communities associated with subduction-related methane seeps. The communities are in very localized limestones of late middle to late Eocene age along the southwestern margin of Washington. These limestones contain large numbers of chemosynthetic bivalves and worm tubes, as well as other macrobenthos, that colonized around cool-temperature methane seeps along the landward slopes of an ancient subduction-zone complex. Calyptogena chinookensis n. sp.is the earliest known species of this genus, which was previously known from Miocene to Recent.