Wards1-100
Wards1-100(contued)
Wards101-130 Wards131-160
Wards131-160(continued)
Wards161-190 Wards191-200
Wards
Collection
131-160
Wards1-100
Wards1-100(contued)
Wards101-130 Wards131-160
Wards131-160(continued)
Wards161-190 Wards191-200
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Peridotite Location: Marquette County, Michigan Description: term used for course-grained olivine-rich rocks in which olivine is the dominate mineral but is les than 90% of the rock. |
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Sandstone Location: Los Angeles County, CA Description: a well cemented sedimentary rock consisting of predominantly quarts.
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Bituminous Shale Location: Utica, NY Description: a laminated or fossile mudrock.
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Coquina Location: St. Augustine, FL Description: N/A
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Phosphorite Location: Barstow, FL Description: "an aphanitic to phaneritic, typically brown to black rock that is oolitic, laminated, nodular, or fossiliferous, with more that 50% apatite."
Raymond, p.720 |
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Pyroxenite Location: Rustenburg District, Transvaal, RSA Description: an ultramafic rock consisting of mostly pyroxene(s); possible accessory minerals include olivine, spinel, garnet, hornblende, biotite, feldspar, and nepheline.
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Arkose Location: Gardiner, Montana Description: type of sandstone that is rich in feldspars.
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Ferruginous Shale Location: Deep Run, PA Description: a laminated or fossile mudrock.
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Lithographic Limestone Location: Solnhofen, Germany Description: "an extremely fine-grained, dense, compact, pale
yellow or grayish limestone that exhibits conchoidal fracture." |
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Dolomite, Variegated Location: Marquette, Michigan Description: slightly metamorphosed limestone. A distinguishing feature of the dolomite is its harness in comparison to limestone. Also often will contain ooids.
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Tuff Location: Pima County, AR Description: "this fragmental rock consists of crystals of quartz, alkali feldspar and plagioclase of various sizes and shapes, pieces of glassy rhyolite and pieces of fine-grained tuff, all enclosed in a fine-grained banded ash matrix which originally may have been glassy."
MacKenzie, p. 8 |
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Micaceous Sandstone Location: Portland, CT Description: a well cemented sedimentary rock consisting of predominantly quarts. In this particular sample there is an abundance of silicates or micas.
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Arenaceous Shale Location: Ravena, NY Description: a laminated or fossile mudrock.
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Dolomitic Limestone Location: Kasota, MN Description: a limestone in which the carbonate fraction consists mostly of dolomite and calcite, with calcite being more abundant.
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Peperino Tuff Location: Albano, Rome, Italy Description: piroclasitic rock which includes sedimentary rocks that are predominantly silicatic, soft, not very compact and often have a granular structure
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Volcanic Breccia Location: Guffey, CO Description: have angular fragments in a sandy mixture
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