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Showing 1 to 3 of 3 for “"Porphyroblast growth"”.
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Relative Timing of Porphyroblast Growth and Peak Metamorphism in the Lower Granite Gorge, Grand Canyon, Arizona.
… and similar in morphology to, S2 indicating that porphyroblasts grew late or after S2 fabric development. Post-porphyroblast movements on S2 fabric involved rotation of porphyroblasts relative to matrix, shearing, and bending of S2 around porphyroblasts. Post-porphyroblast matrix coarsening …
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Geology of the Ashe Formation between Fries and Galax, Virginia
… which strikes N 50° E and dips SE. Metamorphic porphyroblast growth of biotite, garnet, staurolite, and kyanite followed penetrative foliation development, with metamorphic grade increasing stratigraphically upward to form inverted isograds. Thrust faulting along the Fries Fault caused extensive …
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Petrology of the Taconian-Acadian Overlap Zone, Hartland Belt, Western Connecticut
… and Rowe Formations indicate that garnet porphyroblast rims equilibrated with matrix minerals at P-T conditions that are consistent with an Acadian (Devonian) metamorphic field gradient for this area. P-T conditions were calculated by simultaneously solving for a geothermometer and a …