Surficial geology and geomorphology of Greg crater, Promethei Terra, Mars

Geology of Crater Millochau, Terra Tyrrhena Region of Mars

Introduction: The martian highlands preserve a long and complex history of degradation by fluvial, eolian, and mass wasting processes [1-8]. The effects of these processes are best observed on impact craters that characterize the ancient highlands. Previous studies of highland terrains Margaritifer Sinus [9,10], Ismenius Lacus [11,12], Arabia Terra [13], and Promethei Terra [14,15] have shown t...

Columbus Crater and Other Possible Paleolakes in Terra Sirenum, Mars

Introduction: Inferred paleolakes on the surface of Mars are key targets for astrobiology. To date, pale-olakes have been identified primarily based on mor-phologic evidence, including inlet and outlet channels, deltas, and horizontal bedding in closed basins [1-3]. Clay minerals have been identified in some of these settings, but these may be detrital [4]. Other alteration products such as eva...

Geology and geomorphology of Turkmenistan: A review

This article provides a background for scientists interested in a general overview of the geology and geomorphology of Turkmenistan. The basement of Turkmenistan is a complex amalgamation of arc-related terranes developed in the Asiatic and northern Paleotethys oceanic domains during Late Paleozoic to Triassic times. A major part of the country coincides with the Turan Platform, where a thick s...

Surficial Geology of the Swan River Area

Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters

Cross crater is a 65 km impact crater, located in the Noachian highlands of the Terra Sirenum region of Mars (30°S, 158°W), which hosts aluminum phyllosilicate deposits first detected by the Observatoire pour la Minéralogie, L’Eau, les Glaces et l’Activitié (OMEGA) imaging spectrometer on Mars Express. Using high-resolution data from the Mars Reconnaissance Orbiter, we examine Cross crater’s ba...