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Bill Cordua's Photo Gallery

263-WVLMalachite, Cuprite

Jerome, Verde Mining District, Black Hills, Yavapai Co., Arizona, USA

Field of View: 12 cm

Coating of acicular malachite needles, on cuprite on matrix.
Photo ID: 962533     Uploaded by: Bill Cordua   View Count: 6   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

0Q1-DF4Banded iron formation, Magnetite

Ballou Creek, Ashland Co., Wisconsin, USA

Field of View: 4 feet

Outcrop of jaspilite of the Proterozoic Ironwood Banded Iron Formation, exposed in Ballou Creek. Magnetite and specular hematite occur along the bedding planes.
Copyright: © William S. Cordua      Photo ID: 958496     Uploaded by: Bill Cordua   View Count: 18   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

2TF-67DQuartzite

Ballou Creek, Ashland Co., Wisconsin, USA

Field of View: 4 feet

Outcrop of interbedded quartzite and argillite of the Proterozoic Palms Formation, exposed along Ballou Creek. This is interpreted as being deposited in an intertidal environment.
Copyright: © William S. Cordua      Photo ID: 958495     Uploaded by: Bill Cordua   View Count: 12   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

D1H-KL5Slate

Iron Co., Wisconsin, USA

Field of View: 5 feet

Road cut showing steeply dipping slates and interbedded sandstones of the Proterozoic Tyler Formation, exposed on the north side of highway 77, west of Upson.
Copyright: © William S. Cordua      Photo ID: 958486     Uploaded by: Bill Cordua   View Count: 23   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

UAN-3WVConglomerate

Highway 27 roadcuts, Bayfield Co., Wisconsin, USA

Field of View: 4 feet

Road side outcrop of conglomerate, made mostly of large clasts of rhyolite porphyry.
Copyright: © William S. Cordua      Photo ID: 958485     Uploaded by: Bill Cordua   View Count: 19   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

3YL-FM7Granite, Microcline, Quartz, Biotite

Radisson dam, Sawyer Co., Wisconsin, USA

Field of View: 30 cm

Proterozoic granite, showing large microcline crystals in matrix of microcline, quartz, biotite, plagioclase.
Copyright: © William S. Cordua      Photo ID: 958484     Uploaded by: Bill Cordua   View Count: 17   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

Granite along the Couderay River

Radisson dam, Sawyer Co., Wisconsin, USA

Outcrops of Proterozoic granite along the Grimh Flowage of the Chippewa River, at the site of the now-removed Grimh Dam, south of Radisson.
Copyright: © William S. Cordua      Photo ID: 958483     Uploaded by: Bill Cordua   View Count: 6   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

3AC-RE8Pegmatite, Elbaite, Albite, Quartz

Animikie Red Ace pegmatite, Pine River pegmatites, Fern, Florence Co., Wisconsin, USA

Field of View: 18 cm

Specimen of pegmatite showing red elbaite crystals in a matrix of quartz and albite.
Copyright: © Bill Cordua      Photo ID: 951341     Uploaded by: Bill Cordua   View Count: 23   Approval status: Public galleries    Type: Photo - 1974 x 1803 pixels (3.6 Mpix)

EPP-951Travertine

Fayerweather Quarry, Pepin Co., Wisconsin, USA

Field of View: 8 cm

Travertine specimen. Fluoresces and phosphoresces bluish white in SW, MW and LW UV light.
Copyright: © Bill Cordua      Photo ID: 951229     Uploaded by: Bill Cordua   View Count: 11   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)

THK-RP3Tonalite

Marinette Co., Wisconsin, USA

Field of View: 1.4 m

The grey rock is Newingham tonalite, a 1.86 Ma intrusive body in contact with a white graniteicdike. This is exposed in a road cut on U.S. Highway 8 at its intersection with 1 Mile Road ,west of Pembine, Marinette County.
Copyright: © Bill Cordua      Photo ID: 951216     Uploaded by: Bill Cordua   View Count: 29   Approval status: Public galleries    Type: Photo - 2592 x 1936 pixels (5.0 Mpix)
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