BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 
VOL. 9, PP. 269-328, PL. 19 May 19, 1898 
METAMORPHISM OF ROCKS AND ROCK FLOWAGE* 
BY C. R. VAN HISE 
(Presented before the Society December 29, 1897) 
CONTENTS 
Page 
JLAGROCIMCHON. 3 cea eubtoewdG HOS as Gee eEER ie Mea caenA nS ase mnie UEH Sara 270 
Summary of physico-chemical aniiatalles aperetaratemasen evavare gant a teteyalceite rauneaneny Sasue™ 270 
indersnoundstlowarelot water a. cscs ceteces sac ae etiacl. atic 271 
(1) Movement of underground water........  ...-......222.-ee.00e- 271 
@) vouksotaumnderoroumd waters. ieee ede ces ete eae cent 273 
HOMCESTOLMMetAMONplISMA. sh. ceve.s/-\aieic1se.s aie o-oo Mele slevelele o er4ibleravara « eielalscetelers 275 
Dynamic action......... Pe Me ETO aon Wace cine ee en oR tTaR ce 275 
Heart Meeeisve Sepsi ners afs,.ars:ctoiaia dave slausiateye UM DGD DE ROCs Una Sho SIemA Mas 276 
Clangrinignyl actions a aa aula tic coe EIR © Oc ois oc a encin ee ncoee ye nae 276 
Relations of chemical action, heat, and pressure.................... 276 
Application of physico-chemical principles to the earth’s crust............... 217 
Wippermpbiysico-chenmicalezonese eases tee eres ite aa te seed 278 
Woxwenmpbiysico-clhemuicalszones-i.2 soc eae a eee coe ie ee ccie) asieels 278 
Relations of the two physico-chemical zones..........-..-...22-e.0--20 279 
Metamorphism from the dynamic point of view. . ....... 0 ...-.-...25.2--5- 286 
Miolecuilai dy mami cractlomas: sa. ol «\- sayictedaaiubs severe de oa ae ee eta eee 287 
Devitrification of glass under mass finite COMCWMUIOIOE ne ccaccsaccuccce 289 
Recrystallization of minerals under mass static conditions ........... 291 
Distinctive features of intermolecular dynamic action are growth of 
large individuals and preservation of textures.................... 292 
Mass dynamic action and accompanying molecular dynamic action....... 294 
AGING Of EXOTICS S aa OR UR ECR Pe OTT OO ICO orale aoe 294 
Zone of combined fracture and flowage...............-........:.... 295 
HOM EKO fest OWLS CRI PY ies ava tay rails dieie taGia Socrur ators tate mG alers CURE RVENS oe orate ate aoe 295 
Goren UGH OMe poet encty cece sscohs, sisiy A eal lcnav tie uel ateecgetoens coco eaeteastenta ares tele 296 
Recnystablizationk inks os wieder sists, gecsrdoiee eeets apstnatiae ste aciattn eae 296 
Facts of recrystallization ............. BoE ARE RS Sei neienan 296 
Masonry OF RAC VETRINWAINOMN ooo5c5asc00sre ccc nsacouccdqocuss 299 
Recrystallization lags behind deformation ................. 303 
Relations of granulation and recrystallization................... 305 
Charactertofematenialsacs- crs sec eo een ee 305 
Welker Gomes as) sadeonononoD dcoodcas Godouegeods ode b ee 306 
* Published by permission of the Director of the United States Geological Survey. 
XLI—Butt. Geox. Soc. Am., Vou. 9, 1897 (269) 
