100 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [buo,189. 
Geologic formations described — Continued. 
Lake Ketihi moraine, Todd, 5435. 
Lake quartzite-schist, Schrader, 4834. 
Lake Superior sandstone, Grant, 2147. 
Lake Superior sandstone, Van Hise and Bay- 
ley, 5713. 
La Motte sandstone, Keyes, 3090. 
Lane shales, Haworth, 2375. 
Lansdale shale, Lyman, 3616. 
La Plata formation, Cross, 1201. 
La Plata formation, Cross and Spencer, 1206. 
Laramie, Marcou, 3664. 
Laramie, Stanton and Knowlton, 5203. 
Laramie, Todd, 5425. 
Laramie formation, Hills, 2598, 2599. 
Laramie formation, Spurr, 5175. 
Laramie formation, Weed, 5946. 
Laurel limestone, Foerste, 1840. 
Laurel limestone, Foerste, 1839. 
Laurentian, Barlow, 243. 
Laurentian, Bell, 406. 
Laurentian, Coleman, 1038. 
Laurentian, Dawson, 1426.' 
Laurentian, Ells, 1658. 
Laurentian, Low, 3579. 
Laurentian, Melnnes, 3882. 
Laurentian, Winchell and Grant, 6289. 
Lawrence shale, Crane, 1137. 
Lawrence shale, Haworth, 2375. 
Lawrence shale, Keyes, 3128, 3142, 3148. 
Layton formation, Spencer, 5152. 
Leadville limestone, Emmons, 1712. 
Leadville limestone, Spurr, 5175. 
Le Claire beds, Norton, 4124. 
Le Claire limestone, Calvin, 711. 
Lecompton shale, Haworth, 2375. 
Leda clay, Wilson, 6271. 
Lee conglomerate, Keith, 2965. 
Lee formation, Campbell, 736, 737, 739, 740. 
Lee gneiss, Emerson, 1677, 1678. 
Le Grand beds, Beyer, 435. 
Lcona formation, Hill and Vaughan, 2562. 
Leona formation, Vaughan, 5739. 
Leptsena bed, Sardeson, 4799. 
Le Seur limestone, Keyes, 3090. 
Levis series, Dawson, 1423. 
Lewistown formation, Clark, 911. 
Lewistown limestone, Darton, 1335. 
Lewistown limestone, Spencer, 5115. 
Lexington limestone, Campbell, 736. 
Leyden argillitc, Emerson, 1676, 1677. 
Lignitic, Harris and Veatch, 2318. 
Lignitic stage, Harris, 2313. 
Liguanea formation, Spencer, 5152. 
Lime Creek shale, Williams, 6195. 
Lime Creek shale, Calvin, 712. 
Limon beds, Hill, 2557. 
Lincoln porphyry, Emmons, 1712. 
Lincoln slate, Hobbs, 2627. 
Lingulasma bed, Sardeson, 4799. 
Little Compton shales, Shaler, Woodworth, 
and Foerste, 4940. 
Lista Blanca division, Dumble, 1572, 1573. 
Livingston formation, Weed, 5946. 
Lockatong series, Kummel, 3277, 3279, 3280. 
Lockport limestone, Clarke, 971. 
Lockport limestone, Clarke and Schuchert, 
965. 
Geologic formations described — Continued. 
Loco diorite, Weed, 5946. 
Loess, Bain, 173, 195, 196. 
Loess, Beyer, 436. 
Loess, Calvin, 711, 715. 
Loess, Hall and Sardeson, 2253. 
Loess, Hershey, 2495. 
Loess, Keyes, 3132. 
Loess, Leonard, 3464. 
Loess, Norton, 4121. 
Loess, Sardeson, 4807. 
Loess, Shaler, 4935. 
Loess, Shimek, 4957. 
Loess, Tilton and Bain, 5396. 
Loess, Todd, 5423, 5430. 
Loess, Udden, 5511, 5515, 5517. 
Loess, Wilder, 6140. 
Loess formation, Sardeson, 4809. 
Loess formation, Shimek, 4958. 
Logan sills, Winchell, 6372. 
Logie Green, Hill, 2564. 
Longmeadow sandstone, Emerson, 1676, 1677. 
Lookout formation, White, 6052. 
Lorraine, Marcou, 3663. 
Lorraine, Winchell and Ulrich, 6337. 
Lorraine beds, Clarke, 971. 
Lorraine beds, Clarke and Schuchert, 965. 
Loudon formation, Clark, 911. 
Louisiana limestone, Keyes, 3135, 3156. 
Louisiana limestone, Keyes and Rowley, 3119. 
Louisiana limestone, Shepard, 4946. 
Louisville limestone, Foerste, 1839, 1840. 
Loup Fork beds, Todd, 5425, 5428. 
Lower Claiborne, Harris and Veatch, 2318. 
Lower Helderberg, Blatchley, 492. 
Lower Helderberg, Blatchley and Ashley, 
496. 
Lower Helderberg, Girty, 2037. 
Lower Helderberg, Ries, 4622. 
Lower Helderberg group, Lincoln, 3512. 
Lower Helderberg group, Luther, 3602. 
Lower Magnesian limestone, Buckley, 655. 
Lower Marquette series, Smyth, 5102. 
Lower Marquette series, Van Hise and Bay- 
ley, 5704. 
Lower Menominee series, Van Hise and Bay- 
ley, 5713. 
Lower Oneota dolomite, Norton, 4122. 
Lower Osgood clay, Foerste, 1839. 
Lowerre quartzite, Eckel, 1612. 
Lowerre quartzite, Merrill, 3936. 
Lowville limestone, Clarke, 971. 
Lowville limestone, Clarke and Schuchert, 
965, 977. 
Machuca formation, Hayes, 2431. 
Maclurea bed, Sardeson, 4799. 
Maclurea bed, Winchell and Ulrich, 6337. 
Madison beds, Foreste, 1839, 1843. 
Madison group, Weed, 5953. 
Madison limestone, Griswold, 2202. 
Madison limestone, Hague, 2236. 
Madison limestone, Weed, 5945, 5946. 
Magellanian series, Hatcher, 2339. 
Magnesian limestone, Blatchley and Ashley 
496. 
Magnesian limestone, Keyes, 3090. 
Magnesian limestone, Marbut, 3647. 
