Compassion structures on Mars

Article Abstract:

Wrinkle ridges accommodate very low amounts of shortening strain around immense volcanic constructs and within impact basins on Mars. The evenly spared nature of wrinkle ridges that appears to vary systematically between the ridged plains and northern lowlands might be related to the depth of the brittle ductile transition, which is respectively located in the middle crust and upper mantle in these regions.

Thrust faults (Geology), Thrust faults, Fault location (Engineering)

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The Hf-W isotopic system and the origin of the Earth and Moon

Article Abstract:

The earth has a radiogenic W-isotopic composition compared to chondrites, demonstrating that it formed while Hf was extant in Earth and decaying to W. The Hf-W data for lunar samples can be reconciled with a major moon forming impact that terminated the terrestrial accretion process ~30 Myr after the origin of the solar system.

Usage, Earth, Moon, Origin, Chronometers

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Hemispheres apart: The crustal dichotomy on Mars

Article Abstract:

The hemispheric dichotomy, basic feature of Mars expressed by a physiographic and geologic divide between cratered southern highlands and smooth plains of northern lowlands were analyzed. The data suggests that dichotomy formed early in the geological evolution of Mars.

Environmental aspects, Topographical drawing, Topography

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