The D" layer, some 2,700 kilometers (nearly 1,700 miles) below our feet, has been mystifying scientists for decades. Now we ...

For example, in the rocks exposed in the walls of the Grand Canyon (Figure 1) there are many horizontal layers, which are called strata. The study of strata is called stratigraphy, and using a few ...

Here’s how it works. Earth's layers can be assigned according to chemical composition (what they're made of) or mechanical properties (rock strength and elasticity). Earth is made up of several ...

Scientists Thrilled To See Layers In Mars Rocks Near Opportunity Date: January 28, 2004 Source: NASA/Jet Propulsion Laboratory Summary: New pictures from NASA's Mars Exploration Rover Opportunity ...

The asthenosphere exists as a soft layer of solid but malleable rock that can cause the tectonic plates to move and shift. Researchers have wondered what factors make the asthenosphere soft and ...

The planet Mars is home to thick layers of clay that can span hundreds of feet. Since they need water to form, these outcrops have long been of interest to scientists looking for signs of past life on ...

From the chert scattered across the top of the "bald knob" and down through the layers of rock forming the bluffs encircling the mountainsides, the professor of geosciences at the University of ...

Seen around the world, this unconformity refers to a layer where sedimentary rocks have been deposited right on top of the oldest basement rock of the crust. Bizarrely, hundreds of millions of ...

Scientists were looking forward to doing further analysis on the half-inch thick layers evident in images of Martian rocks sent back by the NASA rover Opportunity. Each layer represents an event ...