There are some interesting erosional signs in this observation, which will make for a good comparison with other intracrater fans and fluvial sedimentary landforms.

Narration: Tre Gibbs
https://www.uahirise.org/ESP_039424_1700
NASA/JPL/UArizona

Sinuous Ridge Materials in Reuyl Crater

The focus of this image is on the western end of a fan-shaped landform, located at the end point of a sinuous valley. 

Narration: Tre Gibbs
https://www.uahirise.org/ESP_039731_1580
NASA/JPL/UArizona

A Fan-Shaped Landform and Nearby Light-Toned Material

This enhanced color cutout shows a pit about 600 meters across that is bounded by a steep scarp on its northern side. Similar scarps in the southern mid-latitudes are known to expose water ice that extends to within a couple meters of the surface.

Narration: Tre Gibbs
https://uahirise.org/ESP_066606_1245
NASA/JPL/UArizona

An Icy Scarp in the Southern Mid-latitudes

Based on their shapes and examples of fractured crests in some areas, mega-ripples are thought to be largely inactive relics of past climates.

Narration: Tre Gibbs

https://uahirise.org/ESP_053345_2640
NASA/JPL-Caltech/UArizona

Marvelous Martian Mega-Ripples

This image shows a variety of wind-related features near the center of Gamboa Crater. Larger sand dunes form sinuous crests and individual domes.

Narration: Tre Gibbs

https://uahirise.org/ESP_073613_2210
NASA/JPL-Caltech/UArizona

Piles of Sand with Different Sizes and Colors

This feature looks a bit like a bear’s face. What is it really?

Narrated by Tre Gibbs.

https://uahirise.org/ESP_076769_1380
NASA/JPL-Caltech/UArizona
#Mars #science #NASA

A Bear on Mars?

Gullies lying on the northeast slopes of Triolet Crater (about 11.6 km in diameter ), are located in the Southern Highlands just east of Gorgonum Chaos. Some gullies have eroded through resistant layers up to the crater rim.

Narration: Tre Gibbs

https://uahirise.org/ESP_075886_1425
NASA/JPL-Caltech/UArizona
#Mars #science #NASA

Multiple Episodes of Gully Activity in Triolet Crater

Harmakhis Vallis is an approximately 800-kilometer long outflow channel located in eastern Hellas. The valley probably formed by a combination of surface collapse and flowing water.

Narration: Tre Gibbs

https://uahirise.org/hipod/ESP_075639_1420
NASA/JPL-Caltech/UArizona

Going with the Flow

This impact disturbed dust over an area more than two kilometers wide, large enough to be visible in MARCI daily global images. The largest new crater is about 35 meters in diameter, making it the about the 16th largest new crater found on Mars.

Narration: Tre Gibbs

https://uahirise.org/ESP_076590_2180
NASA/JPL-Caltech/UArizona

A New Impact Event

The surface of Mars is littered with examples of glacier-like landforms. While surface ice deposits are mostly limited to the polar caps, patterns of slow, viscous flow abound in many non-polar regions of Mars.

Narration: Tre Gibbs

https://uahirise.org/ESP_078292_2175
NASA/JPL-Caltech/UArizona
#Mars #science #NASA

Icy Flows

This image shows the transition from a regular channel to an inverted channel in Arabia Terra. The channel was once flowing with water that carved down into the bedrock to produce a depression.

Narration: Tre Gibbs

https://uahirise.org/ESP_078858_2120
NASA/JPL-Caltech/UArizona
#Mars #science #NASA

From Low to High Channels

Many of the Valles Marineris canyons, called chasmata, have kilometer-high, light-toned layered mounds made up of sulfate materials. Ius Chasma, near the western end of Valles Marineris, is an exception.

Narration: Tre Gibbs

https://uahirise.org/ESP_078863_1710
NASA/JPL-Caltech/UArizona
#Mars #science #NASA

Light-Toned Materials along the Floor and Walls of Ius Chasma

This image shows the southern wall of Coprates Chasma, in the equatorial canyon system of Valles Marineris. While much of the lower slopes are covered by sand, exposed bedrock is clearly visible in the upper canyon walls.

Narration: Tre Gibbs

https://uahirise.org/ESP_079482_1650
NASA/JPL-Caltech/UArizona
#Mars #science #NASA

Diverse Minerals in Coprates Chasma

This is the location with the most impressive known gully activity in the Northern hemisphere of Mars. (Audio: www.tregibbs.com) uahirise.org/ESP 049083 2320

A Winter’s View of a Gullied Crater

While it certainly hasn't gone anywhere, a new image of the Phoenix lander shows us how much change has occurred in five Mars years.

Audio: www.tregibbs.com

https://uahirise.org/ESP_053451_2485

The Phoenix Landing Site, 5 Mars Years Later

What organized these boulders into neatly-spaced piles? 

Audio: www.tregibbs.com

https://www.uahirise.org/ESP_053924_2550

The Case of the Martian Boulder Piles

These formations could be recent in geologic time and may mark habitable subsurface environments.

Audio: www.tregibbs.com

https://uahirise.org/ESP_054649_1665

A Volcano of Mud or Lava?

This HiRISE image captures a new impact crater that triggered a slope streak.

Audio: www.tregibbs.com

NASA/JPL/University of Arizona (https://www.uahirise.org/ESP_054066_1920)

Bang and Whoosh!

Aram Chaos lies within an ancient impact crater in the Southern Highlands of Mars.

Audio: www.tregibbs.com

Source: https://uahirise.org/ESP_054753_1825

Uplifted Blocks of Light-Toned Layered Deposits

A hotspot for exploration on Mars centers on areas that were once next to a significant source of heat such as volcanoes. (Audio: www.tregibbs.com)

NASA/JPL/University of Arizona
Source: https://uahirise.org/ESP_055282_2125

This is Not the Hydrothermal Deposit You’re Looking For

The orientation of these dunes tell us the direction of the prevailing wind. (Audio: www.tregibbs.com)

NASA/JPL/University of Arizona
https://uahirise.org/ESP_057071_1890

A Dune Field near Nili Patera

The most habitable places on Mars now and in the past are underground, where water is or was much more stable than at the surface and protected from energetic particle radiation.

Narration: www.tregibbs.com

NASA/JPL/University of Arizona
https://www.uahirise.org/ESP_060978_1555

Mars Underground Exposed: The Central Peak of Alga Crater

This image spans from wall to wall across the center area of an impact crater in Utopia Planitia. From what we see, a lot has happened to modify the appearance of the crater since it was formed.

Narration: Tre Gibbs. 

NASA/JPL/UArizona
https://www.uahirise.org/ESP_032569_2225

ESP_032569_2225

Ice Deposition and Loss in an Impact Crater

The soil surface on Mars is believed to contain water ice, especially at higher latitudes. With the changing seasons, alternate cooling and warming causes the ice-cemented soil to contract and expand.

Narration: Tre Gibbs
NASA/JPL/UArizona
https://uahirise.org/ESP_066782_1110

On Frozen Ground

The objective of this observation is to examine a light-toned deposit in a region of what is called “chaotic terrain” at the base of the Valles Marineris canyon system. 

Narration: Tre Gibbs
https://www.uahirise.org/ESP_037545_1730
NASA/JPL/UArizona

A Light Toned Deposit in Arsinoes Chaos

The bright rocks in this image have minerals that contain water. These water-bearing minerals are found using the companion instrument on the MRO spacecraft called CRISM.

Narration: Tre Gibbs
NASA/JPL/UArizona
https://www.uahirise.org/ESP_036598_1735

Water-Bearing Rocks in Noctis Labyrinthus

HiRISE (High Resolution Imaging Science Experiment) is the most powerful camera ever sent to another planet: Mars! We're one of six instruments onboard the MRO spacecraft, offering up audio of our captioned images release.

BeautifulMars (HiRISE/NASA)

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