Tag Archives: deltas

Geology and astrobiology of McLaughlin Crater

[Editor’s note: From a paper by Joseph Michalski and seven co-authors recently published in the Journal of Geophysical Research.] The Geology and Astrobiology of McLaughlin Crater, Mars: An Ancient Lacustrine Basin Containing Turbidites, Mudstones, and Serpentinites • McLaughlin crater contained … Continue reading

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ExoMars: Eberswalde Crater delta

This intricate structure of an ancient river delta once carried liquid water across the surface of Mars. The distinctive form of a delta arises from sediments that are deposited by a river as it enters slower-moving water, like a lake … Continue reading

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HiRISE: Delta-like lobes in Aeolis Dorsa

Delta-like lobes in Aeolis Dorsa. Branching fluvial deposits appear similar to others at Aeolis Dorsa which have been interpreted as delta-like. With HiRISE images and elevation models we would be able to measure deposit thicknesses more accurately. Observations like these … Continue reading

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We’re going to Jezero!

[From Emily Lakdawalla’s blog at the Planetary Society] NASA announced [November 19] the selection of Jezero crater for the landing site of the Mars 2020 mission. Mars 2020’s launch period opens 19 July 2019, and landing will happen on 18 … Continue reading

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Mars & Earth river deltas branch in similar ways

Planetary Geomorphology Image of the Month, October 16, 2018: Robert C. Mahon (University of New Orleans). Which morphologic features of sedimentary systems persist into the stratigraphic record? Ancient river deltas preserved as stratigraphic deposits on both Earth and Mars exhibit … Continue reading

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The largest delta on Mars?

Planetary Geomorphology Image of the Month, September 1, 2018: Jacob Adler (Arizona State University). Ancient river deltas are found in many locations on Mars [see Di Achile & Hynek, 2010 and references therein], and are formed as sediment drops out … Continue reading

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HiRISE: Mesa in Gale Crater

A mesa in Gale Crater. This is an intriguing delta (?) within Gale Crater, and this is also the first time we’ve imaged it. Beautiful Mars series. [More at links]

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Valley network distribution supports true polar wander and an ancient ocean

[Editor’s note: From a paper by Ngai Ham Chan and three co-authors recently published in the Journal of Geophysical Research.] New Evidence of an Ancient Martian Ocean from the Global Distribution of Valley Networks • Surface deformation due to True … Continue reading

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Hypanis Valles: More likely a delta than a glacier

Is Mars’ Hypanis Valles a glacier? A new study says no. A recent study [published in Icarus] from a team of scientists led by Jacob Adler of Arizona State University explored a unique area of scientific interest on Mars called … Continue reading

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THEMIS: Possible delta in Ius Chasma?

THEMIS Image of the Day, February 26, 2018. This VIS image shows part of eastern Ius Chasma. The lower elevations of Geryon Montes are located at the top of the image. Between the montes and the southern wall face is … Continue reading

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