Wards1-100
Wards1-100(contued)
Wards101-130 Wards131-160
Wards131-160(continued)
Wards161-190 Wards191-200
Wards
Collection
161-190
Wards1-100
Wards1-100(contued)
Wards101-130 Wards131-160
Wards131-160(continued)
Wards161-190 Wards191-200
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Phylite Location: Mariposa County, CA Description: fine-grained metamorphic texture characterized by the presence of a crenulations cleavage, kink bands, and marigolds.
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Red Slate Location: Granville, NY Description: a metamorphic rock formed from moods and shale's when exposed to great heat and pressure. |
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Pink Quartzite Location: Dell Rapids, South Dakota Description: "granolithic, consisting essentially of quartz, and representing metamorphosed sandstone."
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Green Slate Location: Pallet, VT Description: a metamorphic rock formed from moods and shale's when exposed to great heat and pressure. |
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Chlorite Schist Location: Madison County, NC Description: a low-grade, fine-grained variety of mica schist that contains no biotite. |
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Garnet Mica Schist Location: Gassetts, VT Description: Schist with large garnets and abundant amount of muscovite and chlorite. |
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Crumpled Mica Schist Location: Gilpin County, CO Description: a phaneritic, foliated metamorphic rock with an abundant phyllosilicate or acicular minerals. |
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Vishnu Schist Location: Grand Canyon, AR Description: a phaneritic, foliated metamorphic rock with an abundant phyllosilicate or acicular minerals. This particular kind of schist is found most abundantly throughout the Grand Canyon. |
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Hornblende Schist Location: Gouverneur, NY Description: a phaneritic, foliated metamorphic rock with an abundant phyllosilicate or acicular minerals. This sample consists as hornblende as being the dominate mafic mineral. |
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Quartzite, Jasperpebble Location: Sault St. Marie, Ontario, Canada Description: "granolithic, consisting essentially of quartz, and representing metamorphosed sandstone."
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Mylonite Location: Los Angles County, CA Description: "Ductile shear zones are zones of dislocation a few millimeters to hundreds of meters wide, composed of rocks called Mylonites that are recrystalized and/or neocrystallized under the influence of a shearing stress"
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Tactite Skarn Location: San Bernardino County, CA Description: "a holocrystaline, massive, bedded or banded rock rich in calc-silicate minerals, which may or may not carry ore minerals."
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Blue-Grey Marble Location: Lucerne Vally, CA Description: a crystalline metamorphic rock composed of calcite, dolomite, and little quartz. Mineralogy percentages are 95% carbonate (mainly calcite and dolomite) and the source of the marble is a metamorphosed limestone.
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Chocolate Marble Location: Knoxville, TN Description: a crystalline metamorphic rock composed of calcite, dolomite, and little quartz. Mineralogy percentages are 95% carbonate (mainly calcite and dolomite) and the source of the marble is a metamorphosed limestone.
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White Marble Location: Rutland, VT Description: a crystalline metamorphic rock composed of calcite, dolomite, and little quartz. Mineralogy percentages are 95% carbonate (mainly calcite and dolomite) and the source of the marble is a metamorphosed limestone.
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Marble Location: St. Lawrence County, NY Description: a crystalline metamorphic rock composed of calcite, dolomite, and little quartz. Mineralogy percentages are 95% carbonate (mainly calcite and dolomite) and the source of the marble is a metamorphosed limestone.
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Dolomitic Marble Location: Lee, MA Description: a crystalline metamorphic rock composed of calcite, dolomite, and little quartz. Mineralogy percentages are 95% carbonate (mainly calcite and dolomite) and the source of the marble is a metamorphosed limestone. This particular marble has been dolomitized.
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Graphitic Marble Location: Los Angeles, CA Description: a crystalline metamorphic rock composed of calcite, dolomite, and little quartz. Mineralogy percentages are 95% carbonate (mainly calcite and dolomite) and the source of the marble is a metamorphosed limestone.
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Hornfels Location: Riverside County, CA Description: "Fine-grained, usually dark-shaded rock with diablastic or granolithic texture; produced by contact metamorphism."
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Hornfels Location: Lambertsville, NJ Description: "Fine-grained, usually dark-shaded rock with diablastic or granolithic texture; produced by contact metamorphism."
Raymond, p.714 |
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Gypsum var. Alabaster Location: Pomaia, Italy Description: "Aphanitic to phaneritic, soft, commonly layered, gypsum-rich rock formed via evaporation of a saline solution."
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Barite Location: King's Creek, South Carolina Description: "is commonly found as a gangue mineral in hydrothermal sulfide deposits and is also found as concretionary masses, veins, or irregular masses in limestone, dolomite, shale, or other sedimentary rocks."
Nesse, p.155 |
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Hematite Location: Clinton, NJ Description: "A rock in which hematite either constitutes more than 50% of the mineralogy of the rock or one in which hematite is the principle component and comprises more than 33%of the rock."
Raymond, p.715 |
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Clay Ironstone Location: Mazon Creek, IL Description: "a clayey sedimentary rock containing large quantities of iron carbonate or iron oxide in layers of nodules or irregular beds, a clayey sedimentary rock containing large quantities of iron carbonate or iron oxide in layers of nodules or irregular beds."
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Banded Sandstone Location: Mansfield, OH Description: a well cemented sedimentary rock consisting predominantly of quartz. |
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Potosi Dolomite Location: Potosi, MO Description: "The Potosi Dolomite consists of fine- to medium-grained dolomite and a few thin interbeds of shale or siltstone and sporadic quartz sand grains that are most common in northern Indiana. In color it grades downward from light shades of gray and brown to medium and dark shades of gray and brown."
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Red Wall Limestone Location: Yavapai County, AZ Description: "This layer averages about 335 million years old and is composed of marine limestones and dolomites. This is probably the most prominent rock layer in the Canyon as it usually forms a sheer cliff ranging from 400-500 feet in height, which has become a natural barrier between the upper and lower regions of the Canyon. Numerous marine fossils can be found in the Redwall Limestone including brachiopods, clams, snails, corals, fish and trilobites. Many caves and arches can also be seen in the Redwall."
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