منابع مشابه
Conodonts and Biostratigraphy of Upper Ordovician Strata along a Shelf to Basin Transect in Central Nevada
Conodonts representing 38 species of 26 genera have been identified in samples from Upper Ordovician rocks at three central Nevada localities. Ranges of these species and associated graptolites are used graphically to determine correlation of the strata considered with an evolving composite standard that includes information from Ordovician strata at more than 100 localities in North America. R...
متن کاملInnovative approach to strata reinforcement in coal mines with reference to evaluation cable bolts shear strength
There is an increasing need to determine accurately the strength properties of tendons for an effective ground control on mines and underground structures as well as on modelling simulations. The strength properties of cables, used as cable bolts, have been evaluated mainly by their ultimate tensile strength, as this kind of test can be carried out in the field as well as in the laboratory. Onl...
متن کاملMammal-like occlusion in conodonts
—Conodont element function and feeding mechanisms are of considerable paleobiological importance, yet many details remain poorly understood and speculative. Analysis based on morphology, physical juxtaposition, and patterns of surface damage and microwear on pairs of Pa elements from individuals of Idiognathodus indicates that these elements crushed food by rotational closure, which brought the...
متن کاملHeat transfer and thermodynamic processes in coal-bearing strata under the spontaneous combustion condition
Simulations and experiments have been carried out to investigate heat transfer and thermodynamic processes in coal-bearing strata in order to quantitatively understand the development of underground coal fires under the spontaneous combustion condition. With the controlled temperature and under lean oxygen conditions, the thermodynamic parameters for coal oxidation at different stages are exper...
متن کاملOrigin of Discontinuities in Coal-bearing Strata at Roaring Creek (basal Pennsylvanian of Indiana)
Nelson, W.J., Eggert, D.L., DiMichele, W.A. and Stecyk, A.C., 1985. Origin of discontinuities in coal-bearing strata at Roaring Creek (basal Pennsylvanian of Indiana). Int. J. Coal Geol, 4: 355—370. Basal Pennsylvanian coal-bearing strata exposed along Roaring Creek, west-central Indiana, exhibit extreme lateral discontinuity. Coal seams abruptly change in thickness and elevation; they split, g...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1907
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800133448