BH250-89
Title
BH250-89
Subject
Rhyolite
Description
Major Minerals: sanidine, quartz, microcline, orthocalse and devitrified glass
This Rhyolite is mapped as early Proterozoic, post-penokean in the Observatory Hill and at Marquette (Baxter Hollow suite).
This Rhyolite is mapped as early Proterozoic, post-penokean in the Observatory Hill and at Marquette (Baxter Hollow suite).
Coverage
Location: Baraboo, Wisconsin, USA
GPS Location: near 43°34'21.12"N, 89°15'59.68"W
GPS Location: near 43°34'21.12"N, 89°15'59.68"W
Creator
Bereket Haileab
Source
From the rock collection of Bereket Haileab. Sample BH250-89. Housed at Carleton College in Minnesota.
Contributor
Bereket Haileab
Type
Thin section and hand sample
Relation
Collection
Citation
Bereket Haileab, “BH250-89,” BH250 Mineralogy Teaching Collection, accessed April 25, 2026, https://bereket-haileab.geology.sites.carleton.edu/items/show/102.