Dinoflagellate-Small Acritarch stratigraphy of the Campanian-Danian Interval and Organic Facies Evidence of Sea Level Change

甲藻和小型甲藻的地层学研究 Campanian期、Maestrichtian期和 对于露头剖面，提出早丹尼期 美国沿海平原省和核心海洋盆地 可从深海钻探项目/海洋钻探公司获得 程序. 其目的是对这一地区进行地层年代测定 间隔，准备甲藻和疑源类地带， 可以连接到以前发布的 并确定棘囊的性质 白垩纪/第三纪（K/T）界线。 将 需要校准甲藻-疑源类地层 通过调查陆地上的部分，例如布拉格的部分， 亚拉巴马和海洋盆地，例如D. S. D. P.现场的剖面 577.第577章独立的， 极性提供的年龄一致性多学科证据 反向磁性地层学，化学地层学（铱， 碳-13）和钙质化石的生物地层学。 以前对大西洋沿岸平原威尔斯井的研究（晚 白垩纪）和犹他州/怀俄明州逆冲带（中 侏罗纪）表明，甲藻物种丰度 和孢粉学定义的有机相反映了 海进和海退的关系 海侵的证据 不同的岩性背景表明， 生物地层基准面（FAD，LAD）的多次出现， 随后是一段时间的无定形碎片， 甲藻物种的一部分 回归的特点是 甲藻物种在陆生植物碎屑的有机基质中。 美国东部露头和威尔斯井调查沿海 平原将提供一个测试的孢粉学证据。 研究 在邻近的北大西洋西部的站点将测试 深海相海平面变化的孢粉学证据。

Study of the stratigraphy of dinoflagellate and small acritarch species in sediments of Campanian, Maestrichtian and early Danian ages is proposed for sections occurring in outcropin the U.S. Coastal Plain Province and in cored ocean basinsections available from the Deep Sea Drilling Project/OceanDrilling Program. The purpose is to stratigraphically date this interval, to prepare dinoflagellate and acritarch zonations which can be connected to those previously published for the olderretaceous and to determine the nature of the dinocyst record at the Cretaceous/Tertiary (K/T) boundary. It will be necessary to calibrate the dinoflagellate-acritarch stratigraphy byinvestigating sections on land, e.g. sections at Braggs, Alabama, and in the ocean basins, e.g. sections at D.S.D.P. Site 577, for which there is established independent and concordant-multidisciplinary evidence of age provided by polarity reversalmagnetostratigraphy, chemostratigraphy (iridium, Carbon-13), and the biostratigraphy of calcareous fossils. Previous study of wells in the Atlantic Coastal Plain (Late Cretaceous) and in the Utah/Wyoming Overthrust Belt (Middle Jurassic) suggests that dinoflagellate species abundance andpalynologically-defined organic facies reflect episodes oftransgression and regression. Evidence of transgression indifferent lithological settings is indicated by a multipleoccurrence of biostratigraphic datums (FAD, LAD) which is succeeded by an interval of amorphous debris and increased number of dinoflagellate species. Regression is characterized by fewer dinoflagellate species in an organic matrix of landplantdetritus. Investigation of outcrops and wells of the easternU.S. Coastal Plain will provide a test of the palynologicalevidence. Study of sites in the adjacent western North Atlantic will test the palynological evidence of sea level change in thedeep sea facies.