R. Eshelman, Darrin L. Lowery, F. Grady, D. Wagner, H. Gregory McDonald
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引用次数: 1
摘要
在位于马里兰州塔尔博特县蒂尔曼岛切萨皮克湾一侧的木瓜湾,一组规模不大但意义重大的晚更新世哺乳动物在被侵蚀的海岸线上被发现。此外,在该地点的黄土沉积物下的滞后沉积物中发现了克洛维斯时代(距今11,050-10,800年放射性碳[14C]年)的文物。从同一地点黄土下的有机地层中获得的加速器质谱数据表明,这个小化石组合大约有21000年的历史。可识别的分类群包括四个灭绝的物种,Castoroides sp.(巨型海狸),Equus sp.(马),Tapirus veroensis (Vero貘)和Mammut americanum(美洲乳齿象),以及Canis cf. C. latrans(土狼)和Cervus elaphus(瓦皮提)。值得注意的是,貘和巨海狸是马里兰州的第一个记录,而貘是特拉华州、马里兰州和弗吉尼亚州切萨皮克地区沿海平原的第一个记录。Canis cf. C. latrans的临时鉴定可能代表了特拉华州、马里兰州和弗吉尼亚州切萨皮克地区沿海平原的第一个晚更新世记录。
Late Pleistocene (Rancholabrean) Mammalian Assemblage from Paw Paw Cove, Tilghman Island, Maryland
A small but significant assemblage of Late Pleistocene mammals was recovered from an eroding shoreline at Paw Paw Cove, located on the Chesapeake Bay side of Tilghman Island, Talbot County, Maryland. Additionally, Clovis-age (11,050–10,800 radiocarbon [14C] years before present) artifacts were found in a lag deposit beneath a loess deposit at the site. An accelerator mass spectrometry date obtained from an organic stratum below the loess at the same location suggests that this small fossil assemblage is approximately 21,000 years old. Identifiable taxa include four extinct species, Castoroides sp. (giant beaver), Equus sp. (horse), Tapirus veroensis (Vero tapir), and Mammut americanum (American mastodon), along with Canis cf. C. latrans (coyote), and Cervus elaphus (wapiti). Significantly, the tapir and giant beaver are the first records for Maryland, and the tapir is the first record from the Coastal Plain of the Chesapeake region of Delaware, Maryland, and Virginia. The provisional identification of Canis cf. C. latrans may represent the first Late Pleistocene record from the Coastal Plain of the Chesapeake region of Delaware, Maryland, and Virginia.