lfenton

April 30, 2018

Wild & dark lacy dunes on twisty bright layers

Some windblown dunes on Mars are just beyond words. Take these beasts in this 0.95×0.95 km (0.59×0.59 mi) scene: These are a peculiar type of bedform called a transverse aeolian ridge, or TAR for short, with a spacing of about […]
April 23, 2018

Reusing old canvases

The wind on Mars is an artist, or at least it tries really hard to be one. It flutters up and down mountains, winding along valleys, dragging its wings in the sand and building up really amazing structures that could […]
April 20, 2018

Squish! ????

This isn’t a full blog post. Just something I saw while looking around for other things on Mars. And for once it’s (probably) not related to the wind. But it’s cool enough to share. I saw something that went “squish” […]
April 16, 2018

Flow. Lots of flow.

Over the years, many things have flowed across the surface of Mars: lava, ice, water, and wind. Two things have flowed in this image (the view is 0.75×0.6 km or 0.47×0.37 mi): Image credit: HiRISE ESP_026541_1840, NASA/JPL/Univ. of Arizona If […]
April 13, 2018

My 2018 paper on recent climate change in Meridiani Planum, Mars (Part 3)

This is the 3rd (and final) entry in a blog series describing a paper I recently published with colleagues in JGR Planets. Here are links to the previous two entries: Part 1, Part 2. Wow, I didn’t think this would […]
April 12, 2018

My 2018 Paper on Recent Climate Change in Meridiani Planum, Mars (Part 2)

In a previous post, I set the stage for my recently published paper in JGR Planets. A recap: we’ve got good evidence for a change in Mars’s climate. Widespread ripples in Meridiani Planum formed >200,000 years ago, last migrated westward […]
April 11, 2018

My 2018 paper on recent climate change in Meridiani Planum, Mars (Part 1)

Today a big thing happened: a paper I’ve spent a year or so working on has finally been published in the Journal of Geophysical Research: Planets (which we just call “JGR Planets”). Scientists write a lot of papers, so it’s […]
March 26, 2018

Wind-exposed layers

On Earth, layers comprising the geological record of an area are most often exposed by fluvial erosion, as a river cuts through rock (a typical example is the Grand Canyon). On Mars, fluvial channels are not so common (especially in […]
March 19, 2018

Dune trails deep in Hebes Chasma, Mars

A few weeks ago I wrote about dunes leaving behind trails near the north pole of Mars. They do this in a few other places as well, but it’s not very common. Below is a rare example, this time on […]