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单词 grey band
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> as lemmas

grey band
grey band n. North American Geology (now chiefly historical) a stratum of bluish-grey flagstone.
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the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > sandstone > others
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grey band1824
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Ham Hill stone1889
1824 A. Eaton Geol. & Agric. Surv. District Erie Canal 36 (heading) Grey band, (or grey feke).
1863 J. D. Dana Man. Geol. 232 Flagstone,—a gray, laminated quartzose sandstone, called ‘gray band’.
1902 Canad. Rec. Sci. 9 120 In a cutting transverse to the grey band, by which a roadway ascends the Niagara escarpment, near Grimsby, the band shows excellent cross bedding.
1966 Lapidary Jrnl. Oct. 911/1 The caprock is of Kodak sandstone representing what in earlier literature is referred to as the Gray Band.
extracted from greygrayadj.n.
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