A Lower Jurassic flora from the upper Matanuska Valley, Alaska
نویسندگان
چکیده
منابع مشابه
Lateglacial and early Holocene climate oscillations in the Matanuska Valley, south-central Alaska
Here we present multi-proxy data from two cores taken from Hundred Mile Lake in the Matanuska Valley of south-central Alaska to investigate the climate, vegetation and deglaciation history of the last 14,000 years. The chronology of the cores was controlled by five AMS dates. Sediment lithology changes from clay at 14–13 ka (1 ka 1⁄4 1000 cal BP), through marl at 13–8 ka, to gyttja at 8–0 ka. T...
متن کاملGeology and Ground Water Resources of the Matanuska Valley Agricultural Area, Alaska.
This report describes the geology and ground-water resources of an area of present and potential agricultural development in south-central Alaska. The Matanuska Valley agricultural area, which covers about 350 square miles, is in a wide valley flanked by rugged mountains. The valley floor is underlain nearly everywhere by glacial drift whose total thickness is known at relatively few places. Be...
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A palaeosurface with one megatheropod trackway and several theropod tracks and trackways from the Lower Jurassic upper Elliot Formation (Stormberg Group, Karoo Supergroup) in western Lesotho is described. The majority of the theropod tracks are referable to either Eubrontes or Kayentapus based on their morphological characteristics. The larger megatheropod tracks are 57 cm long and have no Sout...
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Early Jurassic fossil plants from sedimentary rocks of Tabbowa, Sri Lanka show a variety of evidence for plant-insect interactions indicative of a terrestrial habitat prevailed in the Gondwanaland. The observed interactions are skelitonizing, blotch and galls, ovipositions or coprolites, leaf mines and leaf chewing. These traces indicate that insects had associated the plants for various purpos...
متن کاملA Diapsid Faunule from the Lower Jurassic Of
provide a test for the hypothesis of faunal change at the Triassic-Jurassic boundary recently proposed by OLSEN and SUES (1986). They are remarkable for the numerical abundance and quality of preservation of the bones, the lithological diversity of fossil-bearing deposits, and the excellent degree of stratigraphic resolution. The vertebrate remains from the McCoy Brook Formation currently repre...
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ژورنال
عنوان ژورنال: Proceedings of the United States National Museum
سال: 1916
ISSN: 0096-3801
DOI: 10.5479/si.00963801.51-2158.451