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"PARKWAY PLASTICS, INC."

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Ward's® Rhyolite (Gray)

Ward's® Rhyolite (Gray)

Light gray, with flow structure.

 
 
Ward's® Tuff (Rhyolitic)

Ward's® Tuff (Rhyolitic)

Gray, fine, friable, with abundant small sanidine crystal fragments.

 
 
Ward's® Andesite (Porphyry)

Ward's® Andesite (Porphyry)

Gray andesite with phenocrysts of felspar and/or hornblende.

 
 
Ward's® Basalt (Flood)

Ward's® Basalt (Flood)

Classic, dark; from the Columbia Plateau.

 
 
Ward's® Diorite

Ward's® Diorite

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.