igneous rock
one of the three main rock types; formed through the cooling and solidification of magma or lava
norite
igneous rock
gabbro-diabase
igneous rock
mangerite
plutonic intrusive igneous rock, that is essentially a hypersthene-bearing monzonite
teschenite
type of igneous rock
felsic rock
igneous rock rich in elements that form feldspar and quartz
leucitite
igneous rock most common in lavas of recent and Tertiary age, which have a fair amount of potassium
mesozoic rocks
igneous rocks crystallizing
basic rock
igneous rocks with 45...52% silica content
greenstone
green-coloured stones (serpentine, jade, turquoise) with symbolic value, notably in Mesoamerican and Māori cultures
intrusive rock
magmatic rock formed below the surface
intermediate rock
type of igneous rock
phanerite
size of matrix grains in the rock are large enough to be distinguished with the unaided eye
Cinder
type of igneous rock
aphanite
igneous rocks which are so fine-grained that their component mineral crystals are not detectable by the unaided eye
dolerite
rock
nephelinite
igneous rock most common in lavas of recent and Tertiary age, which have a fair amount of sodium
volcanic glass
material
acidic rock
type of igneous rock; rock that is either siliceous, having a high content of silica (SiO2), or rock with a low pH
volcanic rock
rock formed from lava erupted from a volcano
pitchstone
dull black glassy volcanic rock
alkaline rock
series of alkaline magmas produced by igneous differentiation
cantera
volcanic rock
ophite
Obsolete term for alkaline effusive rocks with characteristic textural features (ophitic structure)
porphyritic rock
igneous rock containing crystals of contrasting size (large and small crystals)