Lithology
Videos
The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour
Stratigraphy as seen in southeastern Utah
A basalt, showing the 'pillow' lava shape characteristic of underwater eruptions, Italy
A claystone, the finest-grained sedimentary rock, deposited in Glacial Lake Missoula, Montana
An ultramafic mantle xenolith with olivine and pyroxene (altering brown to iddingsite) in a matrix of mafic basalt scoria
Texture (geology)
Videos
In geology, texture or rock microstructure refers to the relationship between the materials of which a rock is composed. The broadest textural classes are crystalline, fragmental, aphanitic, and glass
Texture in a thin section of mylonitic quartzite from the Alps, Italy
Texture in a thin section of tholeiitic basalt
Graphic granite from Norway