Bed of volcanic ash (bentonite) in Chickamauga limestone at Twentieth Street, Birmingham, near summit of Red Mountain on west side, looking east; the bentonite is a yellowish clay between the two prominent layers of limestone. Jefferson County, Alabama. 1925.

Bed of volcanic ash (bentonite) in Chickamauga limestone at Twentieth Street, Birmingham, near summit of Red Mountain on west side, looking east; the bentonite is a yellowish clay between the two prominent layers of limestone. Jefferson County, Alabama. 1925. Plate 17 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, photo print

Boulder of dense tough chert characteristic of Copper ridge dolomite, from Newhope ridge, gorge of Buck Creek between Helena and Pelham. Shelby County, Alabama. 1925.

Boulder of dense tough chert characteristic of Copper ridge dolomite, from Newhope ridge, gorge of Buck Creek between Helena and Pelham. Shelby County, Alabama. 1925. Plate 3 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, Professional Papers, photo print

Big ore seam (at right) overlain by Red sandstone and shale with conglomeratic medium bedded Red sandstone at top, summit of Red Mountain and Twentieth Street, Birmingham, looking southwest. Jefferson County, Alabama. 1925.

Big ore seam (at right) overlain by Red sandstone and shale with conglomeratic medium bedded Red sandstone at top, summit of Red Mountain and Twentieth Street, Birmingham, looking southwest. Jefferson County, Alabama. 1925. Plate 13 in U.S.Geological Survey. Folio 221. 1927

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, Professional Papers, photo print

Big seam of iron ore, Twentieth Street, Red Mountain, Birmingham, looking southeast. Jefferson County, Alabama. Jefferson County, Alabama. 1925.

Big seam of iron ore, Twentieth Street, Red Mountain, Birmingham, looking southeast. Jefferson County, Alabama. 1925. Plate 14 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, Professional Papers, photo print

Part of Red Mountain formation immediately below big seam of iron ore, Twentieth Street cut, Birmingham, at summit of Red Mountain, looking northeast; this part is of Brassfield (Medina) age. Jefferson County, Alabama. 1925.

Part of Red Mountain formation immediately below big seam of iron ore, Twentieth Street cut, Birmingham, at summit of Red Mountain, looking northeast; this part is of Brassfield (Medina) age. Jefferson County, Alabama. 1925. Plate 11 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Formations, Photographers, Professional Papers, All tags... photo print, Fewer tags

Cut on mountain terrace road in northeastern environs of Birmingham, looking southeast, showing position of bed of volcanic ash (bentonite) and the overlying limestone of Trenton age. Jefferson County, Alabama. 1925.

Cut on mountain terrace road in northeastern environs of Birmingham, looking southeast, showing position of bed of volcanic ash (bentonite) and the overlying limestone of Trenton age. The bentonite bed is about 40 feet above the bottom of the thin-bedded limestone shown in the upper part of photos 1869 and 1870. Jefferson County, Alabama. 1925. Plate 10 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, Professional Papers, photo print

Cryptozoon of c. proliferum from Copper ridge dolomite mosteller columbiana quadrangle, about 5 miles east of Shelby Shelby County, Alabama. 1925.

Cryptozoon of c. proliferum from Copper ridge dolomite mosteller columbiana quadrangle, about 5 miles east of Shelby Shelby County, Alabama. 1925. Plate 5 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, Professional Papers, photo print

Quartz, chert, and limestone pebbles in basal part of Lenoir limestone: between wagon road and railroad near south edge of Bessemer quadrangle, in Cahaba valley. Shelby County, Alabama. 1925.

Quartz, chert, and limestone pebbles in basal part of Lenoir limestone: between wagon road and railroad near south edge of Bessemer quadrangle, in Cahaba valley. Shelby County, Alabama. 1925. Plate 7 in U.S.Geological Survey. Folio 221. 1927.

Categories: Image; Tags: Alabama Folio 221, Butts, C. Collection, Photographers, Professional Papers, Railroad, All tags... photo print, Fewer tags