BH250-32
Title
BH250-32
Subject
Serpentinite
Description
Major Mineral: serpentine
Minor Mineral: oxide
BH250-32 is serpentinite, a metamorphic rock composed almost entirely of minerals in the serpentine group. It forms when ultramafic rocks, such as peridotite or dunite, are altered by hydrothermal fluids or seawater.
Under the microscope, serpentinite exhibits low birefringence and typically shows a fibrous or platy habit. Mesh textures, formed by the pseudomorphing of olivine, are common.
Metamorphic Grade: Low-grade metamorphism, often within the greenschist facies.
Minor Mineral: oxide
BH250-32 is serpentinite, a metamorphic rock composed almost entirely of minerals in the serpentine group. It forms when ultramafic rocks, such as peridotite or dunite, are altered by hydrothermal fluids or seawater.
Under the microscope, serpentinite exhibits low birefringence and typically shows a fibrous or platy habit. Mesh textures, formed by the pseudomorphing of olivine, are common.
Metamorphic Grade: Low-grade metamorphism, often within the greenschist facies.
Creator
Bereket Haileab
Source
From the rock collection of Bereket Haileab. Sample 32. Housed at Carleton College in Minnesota.
Type
Thin section
Relation
Collection
Citation
Bereket Haileab, “BH250-32,” BH250 Mineralogy Teaching Collection, accessed April 25, 2026, https://bereket-haileab.geology.sites.carleton.edu/items/show/36.