Object ID:
1917.8.57
Collection:
Natural History-Ladies of New London
Object Name:
Dolerite
Dimensions:
H-1.2 W-3 L-4.8 cm
Description:
Hypabyssal igneous rock, hyposilicic rock (<52% silica), porphoritic plagioclase phenocrysts, phaneritic.
Other Name:
Diabase
VE Exhibit Label 1:
Phaneritic: of or relating to an igneous rock in which the crystals are so coarse that individual minerals can be distinguished with the naked eye. Phaneritic rocks are intrusive rocks that cooled slowly enough to allow significant crystal growth.
Rock Type:
Igneous
Found:
Cape Ann, Massachusetts
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