HiRISE Updates Week of 2017 Mar 27

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HiRISE Updates Week of 2017 Mar 27

Post by bystander » Fri Mar 31, 2017 4:02 pm

Nicole Baugh wrote:

The Splitting of the Dunes (ESP_012897_1685)

The mound in the center of this image appears to have blocked the path of the dunes as they marched south (north is to the left in this image) across the scene. Many of these transverse dunes have slipfaces that face south, although in some cases, it's hard to tell for certain. Smaller dunes run perpendicular to some of the larger-scale dunes, probably indicating a shift in wind directions in this area.

Although it might be hard to tell, this group of dunes is very near the central pit of a 35-kilometer-wide impact crater. Data from other instruments indicate the presence of clay-like materials in the rock exposed in the central pit.

This is a stereo pair with ESP_013319_1685.
Alfred McEwen wrote:

Plains South of Valles Marineris (ESP_011359_1695)

This full-resolution image is centered on a bright deposit at the end of a gully channel.

The bright deposit does not seem to be present in an image acquired several years earlier than 2009, and is likely to be very recent based on its distinctive brightness.

This is a stereo pair with ESP_011509_1380.
Alfred McEwen wrote:

Distinctive Brightness (ESP_011443_1380)

This enhanced-color sample reveals the incredible diversity of landforms on some Martian plains that appear bland and uniform at larger scales.

Here we see layers, small channels suggesting water flow, craters, and indurated sand dunes.
Lauren Edgar wrote:

Layers in Galle Crater (PSP_003855_1275)

This image shows a layered deposit in Galle Crater, located in the Southern cratered highlands.

The geologic history of Galle Crater is not well constrained, and it contains a variety of features that have been interpreted as fluvial, lacustrine or glacial deposits.

The deposit pictured here contains multiple unconformities (sudden or irregular changes from one deposit to another), indicating periods of erosion and non deposition.

This is a stereo pair with PSP_003934_1275.

Credit: NASA/JPL-Caltech/University of Arizona

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Re: HiRISE Updates Week of 2017 Mar 27

Post by owlice » Sat Apr 08, 2017 11:24 pm

The top image is particularly beautiful and intriguing.

It also looks like a very toothy monster snake that's going to bite something -- eeeeek!!!!
A closed mouth gathers no foot.