لكل من يرغب في "التمتع بصحة طيبة"،

وكل من يبحث عن "عمل أو دخل إضافي"،

فضلا اتصل بي ولا تتردد.

تويتر:

الأربعاء، 9 نوفمبر 2016

Wind Carved Rock on Mars


The distinctively fluted surface and elongated hills in this image in Medusae Fossae are caused by wind erosion of a soft fine-grained rock. Called yardangs, these features are aligned with the prevailing wind direction. This wind direction would have dominated for a very long time to carve these large-scale features into the exposed rock.

from NASA http://www.nasa.gov/image-feature/wind-carved-rock-on-mars
via IFTTT

Featured Posts