Sheeting joints and polygonal patterns in the Navajo Sandstone, southern Utah: Controlled by rock fabric, tectonic joints, buckling, and gullying
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چکیده
منابع مشابه
Evolving fracture patterns: columnar joints, mud cracks and polygonal terrain.
When cracks form in a thin contracting layer, they sequentially break the layer into smaller and smaller pieces. A rectilinear crack pattern encodes information about the order of crack formation, as later cracks tend to intersect with earlier cracks at right angles. In a hexagonal pattern, in contrast, the angles between all cracks at a vertex are near 120 degrees. Hexagonal crack patterns are...
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although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...
15 صفحه اولIron Isotopes in Spherical Hematite and Goethite Concretions from the Navajo Sandstone (utah, Usa): a Prospective Study for “martian Blueberries”
NAVAJO SANDSTONE (UTAH, USA): A PROSPECTIVE STUDY FOR “MARTIAN BLUEBERRIES”. Vincent Busigny 2, 3 and Nicolas Dauphas 2, , Origins Laboratory, Department of the Geophysical Sciences, and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago IL 60637, USA ([email protected]), Department of Geology, The Field Museum, 1400 South Lake Shore Drive, Chicago IL ...
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ژورنال
عنوان ژورنال: Geosphere
سال: 2018
ISSN: 1553-040X
DOI: 10.1130/ges01614.1