Tag Archives: sand dunes

THEMIS: Dunes engulfing hills and mesas

THEMIS Image of the Day, March 20, 2018. The bottom of this image shows the hills and mesas within the crater. The dunes at the top of the image are engulfing and covering the hills. In some locations the hills … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , | Comments Off

THEMIS: Dunes and dust in Arabia Terra

THEMIS Image of the Day, March 19, 2018. Located in eastern Arabia is an unnamed crater, 120 kilometers (75 miles) across. The floor of this crater contains a large exposure of rocky material, a field of dark sand dunes, and … Continue reading

Posted in Reports | Tagged , , , , , , , , , , | Comments Off

THEMIS: Frost-free dunes in north polar sand sea

THEMIS Image of the Day, March 16, 2018. This VIS image was collected at the height of summer. It is during this season that winds are able to move sand sized particles, slowly modifying the dunes. Olympia Undae is a … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , , | Comments Off

THEMIS: Dunes in transition

THEMIS Image of the Day, March 15, 2018. This VIS image highlights the dune form/dune density aspects of Olypmia Undae. In the center there is a brighter, diagonal region of few dunes. These dunes are the arc or crescent shape … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , , | Comments Off

THEMIS: Dunes, lacy and regular

THEMIS Image of the Day, March 14, 2018. This VIS image hightlights the density of dunes, the bottom third of the image has fewer dunes, spaced farther apart than the top two thirds of the image. The bottom of the … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , , | Comments Off

THEMIS: Is that gypsum under the dunes?

THEMIS Image of the Day, March 13, 2018. This VIS image of Olympia Undae was collected during north polar summer. The dunes are now completely frost free and are dark in color due to being made of basaltic sand. The … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , , | Comments Off

THEMIS: Edge of the great northern sand sea

THEMIS Image of the Day, March 12, 2018. This VIS image of Olympia Undae was collected during north polar summer. The dunes are now completely frost free and are dark in color due to being made of basaltic sand. The … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , , | Comments Off

THEMIS: Amidst the sea of sand

THEMIS Image of the Day, March 9, 2018. This VIS image of Olympia Undae was collected during north polar spring. The crests of the dunes and other surfaces are light colored, indicative of a frost covering. The density of dunes … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , | Comments Off

HiRISE: The Case of the Martian Boulder Piles

This image was originally meant to track the movement of sand dunes near the North Pole of Mars, but what’s on the ground in between the dunes is just as interesting! The ground has parallel dark and light stripes from … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , | Comments Off

THEMIS: Dunes don’t climb hills (very far)

THEMIS Image of the Day, March 8, 2018. This VIS image of Olympia Undae was collected during north polar spring. The crests of the dunes and other surfaces are light colored, indicative of a frost covering. At the top right … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , , , , , , | Comments Off