BH250-206b
Title
BH250-206b
Subject
Ijolite
Description
Major Minerals: augite (clinopyroxene), titanoaugite (clinopyroxene), hypersthine (orthopyroxene), plagioclase
Minor Mineral: biotite, sphene (titanite), oxides
Optical Features and Texture: Hypersthene exhibits faint pleochroism, while clinopyroxene display anomalous interference colors. The rock shows a characteristic subophitic texture, in which larger plagioclase crystals partially to completely enclose smaller pyroxene grains.
Minor Mineral: biotite, sphene (titanite), oxides
Optical Features and Texture: Hypersthene exhibits faint pleochroism, while clinopyroxene display anomalous interference colors. The rock shows a characteristic subophitic texture, in which larger plagioclase crystals partially to completely enclose smaller pyroxene grains.
Creator
Bereket Haileab
Source
From the rock collection of Bereket Haileab. Sample BH250-206b. Housed at Carleton College in Minnesota.
Contributor
Bereket Haileab
Type
Thin section and hand sample
Relation
Collection
Citation
Bereket Haileab, “BH250-206b,” BH250 Mineralogy Teaching Collection, accessed April 26, 2026, https://bereket-haileab.geology.sites.carleton.edu/items/show/260.