metamorphosed

"These metamorphosed sedimentary rocks that have melted and produced granites that concentrate uranium and thorium are like black box flight recorders that record pressure and temperature," Smye said.

On Earth, there’s an efficient way “to get those rocks up to the surface and cycle surface rocks down to be metamorphosed,” McSween says.

The surface of Venus, meanwhile, is hot enough to melt lead—hot enough that McSween thinks most of its surface rock should have metamorphosed.

Grassi observed these leptocephali larvae metamorphosed into glass eels when they arrived close to the coast and later grew into yellow eels.

The hillsides consist of a mélange of sheared and metamorphosed sedimentary and igneous rocks, crisscrossed with faults that allow water to seep beneath and destabilize the slopes.