Press Esc to close
Sunday 20 August 2017
News updated at 8:53 PM IST

NASA orbiter spots strange secondary craters on Mars

Press Trust of India, Washington, Apr 19 2017, 12:09 IST
Secondary craters form from rocks ejected at high speed from the primary crater, which then impact the ground at sufficiently high speed to make huge numbers of much smaller craters over a large region. File photo

Secondary craters form from rocks ejected at high speed from the primary crater, which then impact the ground at sufficiently high speed to make huge numbers of much smaller craters over a large region. File photo

NASA's Mars Reconnaissance Orbiter (MRO) has captured a region of Mars sprayed with strange-shaped secondary craters. New images show the region of the red planet with secondary craters from 10-kilometre Zunil Crater to the northwest, NASA said.

Secondary craters form from rocks ejected at high speed from the primary crater, which then impact the ground at sufficiently high speed to make huge numbers of much smaller craters over a large region.

In the new images, however, the secondary crater ejecta has an unusual raised-relief appearance like bas-relief sculpture. One idea is that the region was covered with a layer of fine-grained materials like dust or pyroclastics about 1 to 2 meters thick when the Zunil impact occurred about a million years ago. The ejecta served to harden or otherwise protect the fine-grained layer from later erosion by the wind.

Go to Top

Photo Gallery
A butterfly on a flower at a park in Guwahati on...

A butterfly on a flower at a park in Guwahati on...

An artist giving finishing touches to the idols of Lord Ganesha during the upcoming...

An artist giving finishing touches to the idols of Lord Ganesha during the upcoming...

Villagers fishing in the flood-hit Balimukh village in Morigaon district of Assam...

Villagers fishing in the flood-hit Balimukh village in Morigaon district of Assam...

Women take part in an attempt to break the Guinness World Record for the largest 'Disco Dance' to...

Women take part in an attempt to break the Guinness World Record for the largest 'Disco Dance' to...

A villager carrying household items submerged in flood waters, at the flood-hit Balimukh...

A villager carrying household items submerged in flood waters, at the flood-hit Balimukh...

Legend cricketer Sachin Tendulkar with his fans during the 2nd edition of Mumbai Half Marathon...

Legend cricketer Sachin Tendulkar with his fans during the 2nd edition of Mumbai Half Marathon...

Fruit vendors row a boat as they look for customers inside the Dal Lake in Srinagar, the summer...

Fruit vendors row a boat as they look for customers inside the Dal Lake in Srinagar, the summer...

Bollywood actor Ranveer Singh walking the ramp at the Lakme Fashion Week Winter Festive 2017...

Bollywood actor Ranveer Singh walking the ramp at the Lakme Fashion Week Winter Festive 2017...

A flower composition is seen during the 48th Debrecen Flower Festival in Debrecen, 226 kms east...

A flower composition is seen during the 48th Debrecen Flower Festival in Debrecen, 226 kms east...

Bollywood actor Vidyut Jamwal showcases a creation by designer Kazingmei during Lakme Fashion...

Bollywood actor Vidyut Jamwal showcases a creation by designer Kazingmei during Lakme Fashion...

Like us on Facebook

Copyright 2017, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523
Powered by Yodasoft Technologies Pvt. Ltd.