lV 
BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA. 
Page 
Session of Wednesday, Decembenr29 een.) oe wer an nese le nee 413, 
Discovery of marine Cretaceous in boring at Norfolk, Virginia [ab- 
stracti]); byl NEL. DARTONG dere aki a hee be aia ac een 414 
Note on Lepidophloios cliftonensis ; by Sir Wirutram DAwson ......-- 416 
SessionsotelhursdayenDecennlyenze Oks srr ences ie eine aea een 418 
Highth annual report of the committee on photographs.. ... ..... 418 
Concentric weathering in sedimentary rocks; by THomas C. Hor- 
BOING 3 6). 6) oxen se cts: « fanci'e aedenies ay eset coe SIRE ET ne) oe KEIO ae Eee 427 
Note on an area of compressed structure in western Indiana; by 
Grorer HeASHGBY osc Sabele ae OE ele on o> eee 429 
Recister onthe Montreal mec tin cealS 9p easier eee eee 432 
Officers and Fellows of the Geological Society of America.............-.....- 433 
Accessions to the library from March, 1897, to March, 1898; by H. P. CusHine. 443 
Index to volume 9....... wpe pide Grete dc don ala) al cil Gees ae ee Bias ae nae Ne eee 453 
ILLUSTRATIONS 
PLATES 
Plate 1—Sprncer: Geological straits of Tehuantepec............. ------- yas 
ar ey o Plainsnear Puebla. Mesicohss. a0. ono eee eee eee 15 
Be oe Divide of the Tehuantepec isthmus (2 figures)... ..:... 16 
on pwd HW Waterfalls and terraces (3 figures)..... Sala’ (tea 17 
Sy ee) or Exposuremear kaso deleiMiachoneseh aes eee 27 
“«  6—Wixus: Puget Sound basin (overlay)...-...... Ree ELA 0 o.c's 0 112 
OR eh uO Puget:Sound! basins: si. Now seteee aeiegt oc eee ey 
ES i Map of the Tacoma and southern part of the Seattle quad- 
TAN GIES. S20). Se is 5 MS eer eI Re OE 114 
Epa) es Section exposed on Pacific avenue, Tacoma............... 151 
63 ® re IBlevsr Ore AchooummMliny wll, WaxeoywwA,. 5scs0cccco0e0scc0ccenas 152 
“« 11—Apams: Nodular granite from Pine lake, Ontario (3 figures)........ 163 
os —QueErREAU: Map of Jamesville lake and vicinity, New York........ 173 
659183 “ Views of Jamesville lake, New York (2 figures)......... 176 
Al ry Rock and Jamesville gorges (2 figures)........ aici autes 178 
‘* 15—BricHam: Map of the Mohawk Valley region................ airs 183 
6 buns Maprotithe Ottawadkivelspaisimem sir arcane in amen 211 
“ 17—Cusuine: Thin-sections of material from syenite-porphyry dikes 
(GiGSUTES) 3 et ee eR eae eee 256 
“ 18—Smyra: The weathered dike of alnoite in Manheim, New Work. . 257 
“ 19—Vawn Hisu: Thin sections of mashed quartz-porphyry and arnganorr tie 
biotite schist, (2jtieumes) pee esse se ee 301 
(22) VV EDEN OMY GLODNLOVOSKGYCLOSHUG TIC ean ier ane tee eeeee 341 
66 Dil ee Omphalophloios cyclostigma (5 figures)... ......... ei. : 341 
G3 Oy be Omphalophloios cyclostigma (8 figures)................ ..... 341 
‘6 93 & Oinpnalophioosscyclostignunneee et ee eee ee 341 
“ 94 Wire and ScaucnErr: Region of Nugsuak peninsula, west coast of 
Greenland... oa Seta ke ee 343 
CaO) as : 3 Cretaceous and Tertiary exposures in Green- 
Hewaval ((B3 1KeNHRNS) Gocsacocgouncwesjcos- 20> 348 
BG OTR ue “i " Cretaceous and Tertiary exposures in Green- 
le avel (2 ikeuES)\s v6 oo 05G0 238 We eee 350 
