448 PROCEEDINGS OF BALTIMORE MEETING. 



856. Different view, but. same label as 853. 



857. Different view, but same label as 853. 



858. White Mountain range directly east of Alvorcl station and north of Tollgate 



canyon, Inyo county, California. 



859. Granite bowlders resultino; from the disintegration of massive granite, eastern 



slope of Sierra Nevada, three miles west of Big Pine, Inyo county, California. 



860. Granite bowlders resulting from the disintegration of massive granite, eastern 



slope of Sierra Nevada, three miles west of Big Pine, Inyo county, California. 



861. Hill on north side of Deep Spring valley, Inyo county, California ; showing 



strongly marked cleavage in the granite. 



862. Block of granite showing cleavage planes ; north side of Deep Spring valley, 



Inyo county, California. 



863. West end of ridge, giving a nearer view of the cleavage in the granite. 



864. Bowlders resulting from disintegration of granite ; north side of Deep Spring 



valley, Inyo county, California. 



865. Plicated layers of thin bedded chert in limestone etched by erosion. Lower (?) 



Cambrian (?). Hill two miles west of Big Pine, Inyo county, California. 



866. Plicated layers of thin bedded chert in limestone etched by erosion. Lower (?) 



Cambrian (?). Hill two miles west of Big Pine, Inyo county, California. 



867. Different view, but same label as 866. 



868. Different view, but same label as 866. 



869. Mountains west from Hiko, Nevada. 



870. Unconformity of Quaternary and Paleozoic ; looking east from Panaca, Nevada. 



871. Volcanic rocks west of Pahroc spring, Nevada. 



872. Mountains west from Hiko, Nevada. 



873. Permian cliff east of Toquerville, Utah. 



874. Summit of Carboniferous limestone. Hurricane cliff about 10 miles south of 



Toquerville, Utah. 



875. Unconformity between Carboniferous and Permian. On Hurricane cliff, 10 



miles south of Toquerville, Utah. 



876. Looking toward the cliffs from south of Virginia City, Utah. 



877. Permian cliff east of Toquerville, Utah. 



878. Contact of Silurian sandstone on pre-Paleozoic gneiss and schists; looking 



north from below the spring west of the Harding sandstone quarry, one mile 

 north of the Arkansas river and one mile and a half northwest of Canyon 

 City, Colorado. 



879. Shales, broken down by superincumbent weight, or creeping ; half a mile 



north of Columbia, Lancaster county, Pennsylvania ; beside Pennsylvania 

 railroad tracks. 



880. Different view, but same label as 879. 



881. Cliff of massive bedded Lower Cambrian limestone, bluish black at the base, 



white above and capped by thinner layers of a dark arenaceous limestone. 

 Quarries on the line of the Pennsylvania railroad at Bellemont, Lancaster 

 county, Pennsylvania. 



882. A closer view of the cliff. Quarries at Bellemont post office, Lancaster county, 



Pennsylvania, on the line of the Pennsylvania railroad. 



883. Quarry near Bellemont post office, Lancaster county, Pennsylvania. This 



quarry shows the brecciation, caused by jointing and cleavage planes, of the 

 massive limestone shown in 881. 



