PETROLOGY, AND MINERALOGY FOR 1892-1900. 
101 
Geologic formations described — Continued. 
Magnesian limestone, Shepard, 4946. 
Malone formation, Cragin, 1127. 
Mammoth limestone, Smith, 5032. 
Managunk gneiss and schists, Rand, 4528. 
Manasquan formation, Clark, 910, 915. 
Manchioneal formation, Hill, 2564. 
Mancos shale, Cross, 1201. 
Manhattan schist, Eckel, 1612. 
Manhattan schist, Merjall, 3936. 
Manitou, Grant, 2125. 
Manitou series, Winchell, 6352, 6358. 
Manlius limestone, Clarke, 971. 
Manlius limestone, Clarke and Schuchert, 
965, 977. 
Manlius limestone, Weller, 6003. 
Mansfield formation, Clements, 1016. 
Mansfield formation, Clements and Smyth, 
1017. 
Manti formation, Smith, 5039. 
Mapleton sandstone, Gregory, 2166. 
Mapleton sandstone, Williams, 6190. 
Maquoketa, Sardeson, 4799, 4801, 4802. 
Maquok eta shale, Calvin, 711. 
Maquoketa shale, Calvin ami Bain, 720. 
MaqUOketa shale, Norton. 1122. 
Marais des Cygnes shales, Keyes, 3148. 
Marble [sland quartzite, Tyrrell, 5499. 
Marcellus, Ries, 4622, 1623. 
Marcellus shale, Bishop, 448. 
Marcellus shale, Clarke, 971. 
Marcellus shale, Clarke ami Schuchert, 965. 
Marcellus shale, < irahau, 2085. 
Marcellus shale, Lincoln, 3512. 
Marcellus shale, Luther, 3602. 
Marcellus shale, Prosser, 1493. 
Marine des Cygnes coal series, Keyes, 3113. 
Marion, Beede, 398. 
Marion, l'rosser, 1 191, 1 195. 
Mariposa formation, Lindgren, 3547. 
Mariposa formation, Ransome, 1543. 
Mariposa formation, Turner and Ransome, 
5470. 
Maroon formation, Emmons, L712. 
Maroon formation, spun-, 5175. 
Marquette series, Van llise, 5709. 
Marseilles moraine, Leverett, 3495. 
Marsh shales, Walcott, 5815. 
Marshall sandstone, Gordon, 2069. 
Marshall series, Lane, 3394, ."dim. 
Marshalltown shale, Beyei 
Mars Hill conglomerate. Gregory, 2166. 
Marsouin series, 1 » ;[ \\ son, I 123. 
Martinez group, Mernani, 3918. 
Martinez formation, Smith, 5039. 
Martinsburg formation, Clark, 912. 
Martinsburg shale, Darton, L335. 
Martinsburg shale, l'rosser, 1501. 
Martinsburg shale. Spencer, 5115. 
Maryville limestone, Campbell, 740. 
Massanutten sandstone, Spencer, 511."). 
Mata Chin formation, Hill, 2557. 
Matanuska series, Mendenhall, 3903, 3907. 
Matanzas series, Spencer, 5152. 
Matawan formation, Clark, 910, 915. 
Mauch Chunk formation, Clark, 912. 
Mauch Chunk formation, O'Harra, 4129. 
Geologic formations described— Continued. 
Maxville limestone, Lane, ?A00. 
Maxville limestone, Weller, 5986. 
May Pen beds, Hill, 2564. 
McAlister coal group, White, G047. 
McAlester shale, Taff, 5290. 
McAlester shale, Taff and Adams, 5295. 
McCarthy Creek shales, Rohn, 4060. 
McCune limestone, Keyes, 3135. 
McElmo formation, Cross, 1201. 
McElmo formation, Cross and Spencer, 1206. 
McHenry formation, Uhler, 5527. 
McNulty rhyolite, Emmons, 1712. 
Meagher limestone, Weed, 5953. 
Medicine beds, Gould, 2073, 2075. 
Medina, Gilbert, 1992. 
Medina, Ries, 4622. 
Medina sandstone, Clarke, 971. 
Medina sandstone, Clarke and Schuchert, 965. 
Medina sandstone, Luther, 2929. 
Mentor bed, Gould, 2075. 
Mentor beds, Jones, 2929. 
Mentor beds, Prosser, 4491. 
Merced formation, Turner, 5472. 
Merced series, Merriam, 3921. 
Meriden ash bed, Emerson, 1674. 
Merigomish formation, Ami, 110. 
Merom sandstone, Blatchley and Ashley, 496. 
Mesnard quartzite, Van Hise, 5709. 
Mesnard quartzite, Van Hiseand Bayley, 5704. 
Michigamme formation. Van Hise, 5709. 
Michigamme formation, Van Hise and Bay- 
ley, 57nl. 
Michigan series, Lane, 3394, 3400. 
Middlefield granitite, Emerson, 1676. 
Midland sands, Willis and Smith, 6216. 
Midway, Harris and Watch. 2318. 
Millers River conglomerate. Shaler, Wood- 
worth, and Foerste, 4940. 
Millsap limestone, Gilbert,' 2005. 
Millstone grit, Fletcher, 1828. 
Milton formation. Turner, 51(17. 
Minim beds, Hill, 2564. 
Mission Creek series, Emmons, 1713. 
Mission ('reck series, Spurr, 5173. 
Mississippian series, Beyer, 435, 436. 
Mississippian series, Campbell, 737. 
Mississippian series, Keyes, 3090, 3127, 3129, 
3134, 3139. 
Mississippian series, Shepard, 4946. 
Mississippian series, Weller, 5986, 5993. 
Missourian, Bain, 193, 195, 198. 
Missourian, Keyes, 3139. 
Missourian, Leonard, 3464. 
Missourian formation, Tilton and Bain, 5396. 
Missourian series, Keyes, 3090, 3122, 3128. 
Missouri stage, Marbut, 3649. 
Mitchell limestone, Hopkins and Siebenthal, 
27 12. 
Moberly sandstone, Marbut, 3650. 
Moccasin limestone, Campbell, 735, 740. 
Mohawkian, Clarke, 971. 
Mohawkian, Clarke and Schuchert, 965, 977. 
Mojave formation, Smith, 5039. 
Momable slate, Walcott, 5815. 
Monarch formation, Weed, 5945, 5946. 
Moneague formation, Hill, 2564. 
