mud crack

mud crack

[′məd ‚krak]
(geology)
An irregular fracture formed by shrinkage of clay, silt, or mud under the drying effects of atmospheric conditions at the surface. Also known as desiccation crack; sun crack.
References in periodicals archive ?
Energy dispersive x-ray (EDX) analysis of the mud crack region reveals a high level of phosphorus, attributed to the formation of the [Ni.
On the bad board, the intermetallic layer is not continuous, and the mud crack affected [Ni.
This composite image of two 25-second exposures taken from the same location in Death Valley, California, captured the glow of the Milky Way above desert mud cracks just before sunrise on April 2, 2017.
Ancient mud cracks have been discovered on Mars by NASA's Curiosity rover, according to reports.
Mud cracks on the top of the muddy limestone and large-scale erosional features (Fig.
The team believes that thermal fracture and desiccation fracture (formed like mud cracks in a dry lake bed) may be launching small dust particles that are then picked up by sunlight and pushed into the tail.
2 billion-year-old mud cracks, 800-million-year old algal reefs, and 270-million-year-old fossils.
Above the basal conglomerate of the Tapeats, the rest of the formation is composed of sand about 200 feet thick, with bedding containing sedimentary structures typical of tidal flat, beach, and shallow-shore environments that include ripple marks, mud cracks, and raindrop prints (Fig.
The fractures resemble mud cracks on Earth, which form when water-soaked soil dries and contracts, notes rover researcher John Grotzinger of the Massachusetts Institute of Technology.
The parched mud cracks, and the top layers turn black and shrivel like burned bacon.
If Stein and his colleagues are on the right track, it would be the first time Curiosity confirmed mud cracks - technically called desiccation cracks - on Mars.
Fossilized rippling and evidence of mud cracks indicate that over 100 million years ago the river, in what is now China's Szechuan Province, went through dry and wet cycles.