WEEKS.] 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
93 
Geologic formations described — Continued. 
Alachua clay, Leidy, 3447. 
Albany division, Cummins, 1231. 
Albert shale, Rutherford, 4723. 
Albertan, Calvin, 708. 
Albuquerque series, Herrick, 2458. 
Aldrich limestone, McCalley, 3818. 
Allegheny formation, O'Harra, 4129. 
Allegheny series, White, 6053. 
Altamont moraine, Beyer, 435. 
Altamont moraine, Todd, 5435. 
Altamont moraine, Wilder, 6140. 
Amana outlier, Calvin, 711. 
Am boy clay series, Hollick, 2695, 2700. 
Amherst feldspathic mica-schist, Emerson, 
1676. 
Amyzon formation, Smith, 5039. 
Anacacho formation, Hill and Vaughan,2556. 
Anacacho formation, Vaughan, 5739. 
Anamosa limestone, Calvin, 711. 
Anderson sandstone, Keith, 2965. 
Animikie, Grant, 2123, 2125, 2129, 2131, 2133, 
2138. 
Animikie, Mclnnes, 3882. 
Animikie, Winchell, 6352, 635'., 6356, 6357, 6358, 
6372. 
Animosa, Norton, 4124. 
Antietam formation, Clark, 912. 
Aspishapa formation, Hills, 2598, 2599. 
Aquidneck shales, Shaler, Wood worth, and 
Focrste, 4940. 
Arago formation, Diller, 1509. 
Arago formation, Smith, 5039. 
Arapahoe formation, Davis, 1389. 
Arikaree formation, Darton, 1328. 
Arizona slates, Blake ,4832. 
Arkona beach, Sherzer, 4954. 
Aroostook limestone, Gregory, 2166. 
Aroostook limestone, Williams, 6190. 
Arundel formation, Clark, 912. 
Arundel, Clark and Bibbins, 913. 
Ashland limestone, Williams, 6190. 
Ashland shales, Williams, 6190. 
Ashton schists, Shaler, Woodworth, ami 
Foersle, 4940. 
Atane series, While and Schuchert, 6048. 
Atchison shale, Keyes, :'>i fJ, 3148. 
Atchison shale, Prosser, 1495. 
Athabasca sandstone, Tyrrell, 5499. 
Athens shale, Campbell, 740. 
Atlantosaurus beds, Logan, 3559. 
Atlantosaurus beds, Marsh, 371'.!, 3718. 
Atoka formation, Taff and Adams, 5295. 
Attleboro sandstone, Shaler, Woodworth, ami 
Foerste, 4940. 
Aturia formation, Smith, 5039. 
Auburn shale, Beede, 390. 
Augusta, Beyer, 435. 
Augusta, Keyes, 3127, 3129. 
Augusta limestone, Marbut, 3646, 3647, 3650. 
Augusta limestone, Shepard, 4946. 
Augusta, Weller, 5993. 
Auriferous gravels, Merriam, 3921. 
Auriferous gravel series, Turner, 5471. 
Austin chalk, Hill and Vaughan, 2556. 
Austin chalk, Vaughan, 5738, 5739. 
Avalon terrane, Walcott, 5815. 
Geologic formations described— Continued. 
Ballard, Hill, 2564. 
Badito formation, Hills, 2599. 
Bangor limestone, McCalley, 3818. 
Baptanodon beds, Marsh, 3712. 
Barachois slates, Fletcher, 1828. 
Barbacoas formation, Hill, 2557. 
Barbican, Hill, 2564. 
Barnstable series, Shaler, 4933, 4934. 
Barker formation, Weed, 5945, 5946. 
Barker porphyry, Weed, 5945, 5946. 
Barranca division, Dumble, 1572, 1573. 
Barrington clays, Fuller, 1903. 
Barton Creek, Cragin, 1130. 
Basal sandstone, Berkey, 427. 
Basal sandstone, Norton, 4122. 
Basement complex, Van Hise and Bayley, 
5704. 
Basement series, Smith, 5059. 
Bashi, Harris, 2313. 
Bassimenan lake granite, Winchell, 6352. 
Bates Hole formation, Smith, 3039. 
Batesville sandstone, Drake, 1539. 
Batesville sandstone, Weller, 5986. 
Batesville sandstone, Williams, 6191. 
Baucari division, Dumble, 1573. 
Bayard formation, Clark, 912. 
Bays sandstone, Campbell, 735, 740. 
Beacon Hill formation, Salisbury, 4775. 
Beacon Hill formation, Salisbury and Knapp, 
177:;. 
Bearwallow conglomerate. Campbell, 735. 
Heaver Hay diabase, Winchell, 6372. 
Becket gneiss, Emerson, 1676, 1677. 
Becraft limestone, Clarke, 971. 
Becraft limestone, Clarke and Schuchert, 
965, 977. 
Becraft limestone, Weller, 6003. 
Bedford limestone, Hopkins and Siebenthal, 
2742. 
Bed rock complex, Ransome, 4543. 
Bed rock series, Lindgren, 3534, 3517. 
Bed rock series, Turner, 5467, 5471. 
Bed rock series, Turner and Ransome, 5470, 
5485. 
Beekmantown limestone, Clarke, 971. 
Beekmantown limestone, Clarke and Schu- 
chert, 965, 977. 
Belchertown tonalite, Emerson, 1676. 
Bolfast bed, Foerste, 1843. 
Bellerophon bed, Sardeson, 4799. 
Bellowspipe limestone, Hobbs, 2646. 
Bells Landing, Harris, 2313. 
Bellvale flags, Ries, 4622. 
Belly River beds, Knowlton, 3251. 
Beloit formation, Sardeson, 4799. 
Belt formation, Weed, 5946, 5953. 
Benton, Bain, 196. 
Benton, Darton, 1323, 1328. 
Benton, Haworth, 2369. 
Benton, Logan, 3552. 
Benton, Weed and Pirsson. 5942. 
Henton shale, Wilder, 6140. 
Berkshire schist, Dale, 1256, 1257. 
Berkshire schist, Hobbs, 2646. 
Berlin rhyolite-gneiss, Weidman, 5970. 
Bernardston formation, Emerson, 1676, 1677. 
