Geo Advent Calendar Day 10

Today features a grain mount of epidote which was collected on a fieldtrip to Spain earlier this year. A grain mount is a quick and easy alternative to making a thin section. Particles from a sample are mounted onto a glass slide with epoxy and covered with a cover slip; this can then be viewed with a petrographic microscope. When I collected the specimen, I was unsure of what the mineral was. Luckily, Ruth Siddall was able to identify the mineral and make the grain mount.
10-epidote

Accession Number C0017
Status Accessioned
Specimen Type Grain mount
Brief Description Epidote
Full Description Slide of grains from C0116 (epidote). Created using a medium melt mount with a refractive index of 1.662
Quantity 1
Age (Ma) ?
Location Road A384, km 59, near Olvera, Málaga, Spain
Collector Nadine Gabriel
From Fieldtrip? GEOL3040: Crustal Dynamics, Mountain Building and Basin Evolution, 2016-04-03 to 2016-04-15
Associated Notebook? Notebook 6, pages 4-9, locality 44, sample 18
Acquisition Method Collected
Acquisition Date 2016-04-14 (date of rock collection, grain mount obtained on 2016-07-08)
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