Sentences with phrase «ancient riverbed»

Rose's team of archaeologists and geologists gathered more than 800 artifacts from ancient riverbeds in the Dhofar Mountains of southern Oman.

These photos painted the Red Planet in an entirely new light, revealing huge volcanoes, giant canyons and what appeared to be the remnants of ancient riverbeds.

Soil and conditions are typical of AVAs with alluvial ancient riverbed cobbled clay.

Ancient riverbed deposits of mud rock — rocks containing bits of clay and silt smaller than grains of sand — began increasing around 458 million years ago, around the time that rootless plants became common across Earth, researchers say.

Further missions studied the Earth from above, such as one that used of a type of radar to probe below the surface — discovering ancient riverbeds beneath the Sahara Desert, for example.

A series of robotic missions, from Viking in the 1970s to the Spirit rover still roaming Mars today, have observed ancient riverbeds and polar ice caps storing enough water to submerge the entire planet in an ocean 40 feet deep.

Soil is lean with ironstone, buckshot gravel and quartz, an interesting remnant from an ancient riverbed.

The Viking landers saw water frost on rocks, the Phoenix lander found water ice buried centimeters beneath the soil, and the Curiosity rover has rolled through an ancient riverbed.

One of Curiosity's first major findings after landing on the Red Planet in August 2012 was an ancient riverbed at its landing site.

Dunford proposed focusing on an ancient riverbed called Verde Vallis.