Browse Items (1651 total)

1:62500

Kingdom: Animalia Phylum: Echinodermata Class: Echinoidea Order: Spatangoida Family: Spatangidae Genus: Species:

Rough with oxidized section

Kingdom: Plantae Phylum: Equisetophyta Class: Equisetopsida Order: Family: Genus: Species:

Spotted Spaulding Granite, member of the Spaulding Quartz Diorite. Part of an irregular sill, not the major facies. Spotted appearance, extends through more mafic facies. Thin section contains quartz, alkali feldspar, plagioclase, mica, and…

OCR PDF of supplemental information for the St. Francois Mountains collection.

1:62500

1:62500

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Schist bearing both staurolite and chloritoid. This marks the first appearance of staurolite in the metamorphic sequence. Also contains garnet, muscovite, chlorite, biotite, feldspar, and quartz. The assemblage in not in equilibrium.

The thin…

Mineralogy: quartz, feldspar, biotite, staurolite. Foliated. Foliation caused by biotite, staurolite is porphyroblastic. Biotite-staurolite-schist. Staurolite Zone.

Schist with coarse staurolite grains. This outcropping is approximately on the strike of the chloritoid schists (sample 7). Also contains garnet, muscovite, feldspar, and quartz. Presumed to be from the Everett Schist.

The thin section shows…

Mica-based schist with porphyroblasts of staurolite.

includes some sillimanite and occurs in distinct bands

Isoclinal folding and cross bedding, spelitic and sandy beds all present

Staurolite rimmed with muscovite

Some remnants of andalusite

Moslty conglomerates, but partly staurolite rimmed with muscovite