Simple Lithology
high magnesium fine grained igneous rock
http://resource.geosciml.org/classifier/cgi/lithology/high_magnesium_fine_grained_igneous_rocks
 |
definition | fine-grained igneous rock that contains unusually high concentration of MgO. For rocks that contain greater than 52 percent silica, MgO must be greater than 8 percent. For rocks containing less than 52 percent silica, MgO must be greater than 12 percent. |  |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 |
example |
|
|||||||||
|
narrower |
|
|||||||||
|
source | LeMaitre et al. 2002 | |
||||||||
|
type |
|
|||||||||
|
broader |
|
|||||||||
|
in scheme | simplelithology | |||||||||
|
is primary topic of | high magnesium fine grained igneous rocks& properties=definition | |||||||||