Ailsa Craig microgranite glacial erratic

Description: Four specimens of Reibeckite microgranite brought from Ailsa Craig for comparison purposes. Three with dark blue, medium grained, mottled riebeckite phenocrysts with a light yellowish grey fine-grained matrix. One is brownish grey; fine-grained groundmass with fine-grained euhedral feldspars and medium-grained black (riebeckite?) phenocrysts intergrown with fine-grained feldspars.

Taxonomic name: glacial erratic: Ailsa Craig riebeckite microgranite

Collection: Natural History Geology Collection

ID number: 1955-0127

Comments

Name*:

Comment*:

Email: Optional, not displayed

Manx National Heritage (MNH) will always put you in control of the information we send you. Read our privacy policy