Press Esc to close
Friday 23 June 2017
News updated at 2:02 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
Telugu actor Allu Arjun speaks during promotion of the film'DJ' in Bengaluru on Thursday...

Telugu actor Allu Arjun speaks during promotion of the film'DJ' in Bengaluru on Thursday...

A woman gingerly makes her way through a flooded road in Guwahati after heavy rains...

A woman gingerly makes her way through a flooded road in Guwahati after heavy rains...

A man jumps into Lake Walensee, with the Churfristen mountain range in the background...

A man jumps into Lake Walensee, with the Churfristen mountain range in the background...

A man sketches a portrait of Hindi Lord Shiva to earn money alongside a road in Kolkata...

A man sketches a portrait of Hindi Lord Shiva to earn money alongside a road in Kolkata...

A rhino with its calf at the Pobitora Wildlife Sanctuary in Morigaon district of Assam...

A rhino with its calf at the Pobitora Wildlife Sanctuary in Morigaon district of Assam...

An Icelandic horse shakes off flies in its paddock in Anspach near Frankfurt...

An Icelandic horse shakes off flies in its paddock in Anspach near Frankfurt...

The Namma Metro Train work is going on at R V Engeeniring College,Mysuru Road in Bengaluru...

The Namma Metro Train work is going on at R V Engeeniring College,Mysuru Road in Bengaluru...

Portugal's Cristiano Ronaldo attends a training session at the Spartak Stadium in Moscow, Russia...

Portugal's Cristiano Ronaldo attends a training session at the Spartak Stadium in Moscow, Russia...

A helicopter drops water as U.S. Forest Service firefighters and several other departments battle...

A helicopter drops water as U.S. Forest Service firefighters and several other departments battle...

A tiger licks a block of ice containing chicken parts offered by zoo keepers during the summer...

A tiger licks a block of ice containing chicken parts offered by zoo keepers during the summer...

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.