BH250-2
Title
BH250-2
Subject
Eclogite
Description
Major Minerals: garnet, orthopyroxene, clinopyroxene
BH250-2 is a high-grade metamorphic rock composed of garnet, orthopyroxene, and clinopyroxene. The pyroxenes exhibit wavy extinction, indicating deformation under ductile conditions. Based on its mineral assemblage, this rock has reached granulite facies, suggesting formation at high temperatures and moderate to high pressures. It likely represents deep crustal rocks that were metamorphosed during continental collision or crustal thickening.
Alternatively, due to the dominance of garnet and pyroxenes and the absence of felsic minerals, BH250-2 may also be classified as a garnet pyroxenite, a mafic to ultramafic rock type commonly associated with deep-seated metamorphic or mantle-derived processes.
BH250-2 is a high-grade metamorphic rock composed of garnet, orthopyroxene, and clinopyroxene. The pyroxenes exhibit wavy extinction, indicating deformation under ductile conditions. Based on its mineral assemblage, this rock has reached granulite facies, suggesting formation at high temperatures and moderate to high pressures. It likely represents deep crustal rocks that were metamorphosed during continental collision or crustal thickening.
Alternatively, due to the dominance of garnet and pyroxenes and the absence of felsic minerals, BH250-2 may also be classified as a garnet pyroxenite, a mafic to ultramafic rock type commonly associated with deep-seated metamorphic or mantle-derived processes.
Creator
Bereket Haileab
Source
From the rock collection of Bereket Haileab. Sample 2. Housed at Carleton College in Minnesota.
Type
Thin section
Relation
Collection
Citation
Bereket Haileab, “BH250-2,” BH250 Mineralogy Teaching Collection, accessed April 25, 2026, https://bereket-haileab.geology.sites.carleton.edu/items/show/2.