BH250-13
Title
BH250-13
Subject
Granite
Description
Major Minerals: quartz, orthoclase, albite
Minor Minerals: hornblende, titanite (sphene), zircon, biotite, microcline, perthite, sericite, chlorite, calcite (secondary), apatite
Mineralogy Comments: myrmekite
Optics: small 2V, biotite BXA(x) figure, optically negative biaxial mineral, biotite cut perpendicular to c-axis, radiation damage, pleochroic halo, tar tarn twining
Minor Minerals: hornblende, titanite (sphene), zircon, biotite, microcline, perthite, sericite, chlorite, calcite (secondary), apatite
Mineralogy Comments: myrmekite
Optics: small 2V, biotite BXA(x) figure, optically negative biaxial mineral, biotite cut perpendicular to c-axis, radiation damage, pleochroic halo, tar tarn twining
Creator
Bereket Haileab
Source
From the rock collection of Bereket Haileab. Sample BH250-13. Housed at Carleton College in Minnesota.
Contributor
Bereket Haileab
Type
Thin section
Relation
Collection
Citation
Bereket Haileab, “BH250-13,” BH250 Mineralogy Teaching Collection, accessed April 25, 2026, https://bereket-haileab.geology.sites.carleton.edu/items/show/14.