Various igneous glacial erratics

Description: Various, mostly igneous, glacial erratics. White ammygdaloidal pumice (ammygdales of quartz and a black mineral). A weathered fine-grained igneous rock with weathered olive green phenocrysts of ?olivine. A poorly sorted fine- to coarse-grained greywacke. An olive black micritic limestone. Ailsa Craig riebeckite microgranite.

Taxonomic name: glacial erratic: pebbles

Collection: Natural History Geology Collection