TITLES AND ABSTRACTS OF PAPERS 89 



formerly supposed. In the northeastern portion of the continent there was an 

 important uplift in the Acadian region. Farther south Appalachia was raised. 

 In the southern interior there were important positive movements in the Llano 

 area of Texas, in the region of the Wichita and Arbuckl Mountains of Okla- 

 homa, and in New Mexico. The Ozark Mountains were elevated at this time, 

 and there is evidence that the Nemaha Mountains, a granite ridge of north- 

 central Kansas now buried by the Pennsylvanian, were formed during the 

 same orogenic epoch. To the north there appears to have been an uplift of the 

 Siouxian area in northwestern Iowa and adjacent parts of South Dakota and 

 Minnesota, of Wisconsin, and of the La Salle anticline of Illinois. Brook:^ 

 describes late Mississippian diastrophic movements in Alaska, and it is believed 

 that there were similar readjustments in western North America at the same 

 time. As a result of the orogenic movements enumerated above, several im- 

 portant structural basins were formed. At the beginning of the Pennsylvanian 

 sedimentation in central North America, important geosynclines were present 

 in Michigan, Illinois, Indiana, Kentucky, and Missouri, Iowa, Nebraska, Kan- 

 sas, Arkansas, Oklahoma, into which advanced the Pennsylvanian seas and in 

 which the Pennsylvanian deposits were laid down. 



Eead by title in the absence of the authors. 



POST-GLACIAL UPLIFT OF THE NEW ENGLAND COASTAL REGION 

 BY HERMAN L. FAIRCHILD 



(Abstract) 



During the summer of 1918 examination has been made of eastern Connecti 

 cut, Rhode Island, Marthas Vineyard, Nantucket, eastern Massachusetts, and 

 Cape Cod and points on the Maine coast as far as Mount Desert. The stud;^ 

 confirms the practical accuracy of the map showing continental uplift, pub- 

 lished in the Bulletin of this Society, volume 29, page 202 (and similar maps 

 in Science, volume 47, page 616, June 21, 1918, and in Proceedings of the Na- 

 tional Academy of Sciences, volume 4, page 230, August, 1918). Any changes 

 in the lines of equal uplift (isobases) over southeastern New England will be 

 slight and unimportant. 



The evidence of submergence since the last ice-sheet is positive. Excepting 

 marine fossils (which are not expected in deposits near the glacier margin and 

 at higher levels), all classes of features are found that would be sought in 

 proof of standing water. These are: delta plains at the summit level on all 

 streams from higher ground; wave-planation of gravel areas (kames) at vari- 

 ous levels ; extensive still-water deposits at all lower levels ; and prevailing 

 pell-mell structure of water deposits at inferior levels, because they had been 

 poured by glacial drainage into deep water. Clean horizontal lines, the com- 

 mon inscription of standing water, are very generally visible. 



The sand plains in eastern Massachusetts, which have been attributed to 

 glacial lakes, are only the effects of wave-work by the shallowing sea-waters. 

 No glacial waters existed there except the higher levels of Crosby's Lake 

 Nashua, for the reason that the areas of supposed lakes are all beneath the 

 summit marine plane. 



Deposits of standing water origin are found at or near the summit plane 



