Press Esc to close

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

More from this section
Most trending stories
Photo Gallery
Indian cricket captain Virat Kohli with his actress wife Anushka Sharma during their wedding...

Indian cricket captain Virat Kohli with his actress wife Anushka Sharma during their wedding...

Former footballer of Argentina Diego Maradona with his wife after being felicitated at a programme..

Former footballer of Argentina Diego Maradona with his wife after being felicitated at a programme..

An Afghani lady cadet at practice session for small arms at Officers Training Academy (OTA)...

An Afghani lady cadet at practice session for small arms at Officers Training Academy (OTA)...

Congress party workers display signboards pasted with the pictures of Jawahar Lal Nehru...

Congress party workers display signboards pasted with the pictures of Jawahar Lal Nehru...

Artists making a 75 M-long live watercolor painting for a world record at Central Park...

Artists making a 75 M-long live watercolor painting for a world record at Central Park...

Patidar community leader Hardik Patel waves at supporters during a road show for the second phase...

Patidar community leader Hardik Patel waves at supporters during a road show for the second phase...

Activists of the All Assam Students Union (AASU) forming a human chain while staging a protest...

Activists of the All Assam Students Union (AASU) forming a human chain while staging a protest...

Congress Vice President Rahul Gandhi offering prayers at Shamlaji Temple in Aravali district...

Congress Vice President Rahul Gandhi offering prayers at Shamlaji Temple in Aravali district...

Russian Foreign Minster Sergei Lavrov calls on President Ram Nath Kovind at Rashtrapati Bhavan...

Russian Foreign Minster Sergei Lavrov calls on President Ram Nath Kovind at Rashtrapati Bhavan...

WWE wrestler Dalip Singh Rana or Great Khali calling on Madhya Pradesh Chief Minister Shivraj Singh.

WWE wrestler Dalip Singh Rana or Great Khali calling on Madhya Pradesh Chief Minister Shivraj Singh.

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.