نتایج جستجو برای: mississippian

تعداد نتایج: 332  

1998

The Upper Mississippian Hinton, Princeton, and Bluestone formations of southern West Virginia constitute a westwardly thinning wedge of strata that filled the central Appalachian basin over a ~7 million year time interval. Up to 17 unconformity bounded, transgressiveregressive sequences comprise the study interval in the basin depocenter. Five sequence types are recognized based upon the degree...

2008
Thomas W. Kammer William I. Ausich

A total of 47 genera, in 80 species, of Mississippian, or Lower Carboniferous, crinoids are evaluated from 61 localities in Scotland based on a modern update of the literature, study of museum collections, and new field work. Among the 80 species, 76 are considered valid, with eight requiring new combinations of genus and species names. In addition, one species is considered a nomen dubium, and...

2000
PAUL W. JEWELL

The Middle Mississippian Delle phosphatic event marks a significant change in depositional conditions in the Devonian–Mississippian Antler foreland basin of North America. Stratigraphic and petrographic studies show that deposition of Delle-event rocks ended a long period of open-marine carbonate sedimentation when facies shifted to phosphorites, cherts, fine-grained siliciclastics, and lime mu...

Journal: :Palaeontologische Zeitschrift 2022

Abstract The Carboniferous outcrops from Adarouch (central Morocco) are composed of siliciclastic and carbonate rocks, the latter have yielded abundant fossils. upper part marine succession in Idmarrach Formation its laterally equivalent Tirhela belong to Bashkirian. More recent investigations poorly preserved coral assemblages 2 section here described. assemblage comprises several typical Miss...

Journal: :Iowa Geological Survey Annual Report 1923

2017
R. PETER RICHARDS

A concretion from the lower Mississippian Meadville Shale Member of the Cuyahoga Formation near Lodi, Ohio, preserves a population of Orbiculoidea newberryi Hall in life position, associated with what is interpreted to be an unidentified soft-bodied organism. The brachipods show a diffuse unimodal orientation, parallel to the axis of the "host" organism, in what was probably an upward direction...

2001
C. CLIFFORD DONNA C. BOYD

The remains of at least 160 individuals from 15 burial caves in Southwest Virginia and East Tennessee are compared in terms of their temporal and spatial context, age and sex profiles, incidence of pathologies, and degree and type of postmortem alteration of bone. Individuals appear to have been interred predominantly as primary inhumations. Dental pathologies are frequent for these Late Woodla...

2001
JoAnne Nelson

The goal of this project is to trace into central northern B.C. stratigraphy known to host Mississippian volcanogenic massive sulphide deposits such as Kudz Ze Kayah, Wolverine, and Fyre Lake, which lie within the Yukon Tanana Terrane in the Finlayson Lake belt of central Yukon. It is part of the Jennings River/Wolf Lake component of the Ancient Pacific Margin NATMAP project, a cooperative effo...

2012
A. K. Tandon

Unconventional shale-gas plays are formed by fine-grained organic-rich shales of tight-porosity and ultralow permeability which act as the source, seal, and the reservoir rock. The shale-as-reservoir has its beginnings in 1820 but commercial shale-gas wells were drilled in 1990s in Mississippian Barnett Shale of USA by Mitchell Energy after prolonged (about 17 years) experimentations and advanc...

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