The rocks are picrite, alkaline basalt and trachyandesite.
2.
Rock types include picrite, peridotite, dunite, pyroxenite, gabbro and granophyre.
3.
However, triple-base nitrocellulose / nitroglycerine / picrite was used throughout the war and eventually replaced all others.
4.
Some of the beaches there are of a greenish colour, because of the olivine sand resulting from picrite basalt lavas.
5.
Embedded in the diorite are a couple of large gabbro inclusions, as well as a picrite on the east of Braye Bay.
6.
Volcanic rocks rich in magnesium may be produced by accumulation of olivine phenocrysts in basalt melts of normal chemistry : an example is picrite.
7.
Dependent upon various regional locations, the NAIP is made up of MORB ( Mid Ocean Ridge Basalt ), alkali basalt, tholeiitic basalt, and picrite basalt.
8.
This area was also the source of late Neolithic and Early Bronze Age battle-axes and axe-hammers, made from picrite that were widely traded around 2000bc.
9.
Picrite basalt is found in the lavas of Mauna Kea and Mauna Loa in Hawaii, Cura�ao, in the Piton de la Fournaise volcano on R�union Island and various other oceanic island volcanoes.
10.
Chemical classifications are preferred to classify volcanic rocks, with phenocryst species used as a prefix, e . g . " olivine-bearing picrite " or " orthoclase-phyric rhyolite ".
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