| Abstract: | Evidence from the Boston Harbor drumlins indicates that two superposed tills were deposited during glacier advances which were separated by a long nonglacial interval. At Long and Peddocks Islands, argillans and truncated clay-filled fractures, along with discontinuities in clay-mineral composition, define the till contacts. Physical indicators separating the tills are not apparent at other exposures, where till boundaries were defined solely by discontinuities in clay-mineral composition. The weathering profile in the upper part of the lower till indicates extensive weathering under a climate similar to that of today, and probably similar to that of the Sangamon Interglaciation. The depth of the weathering profile, the sequence of clay-mineral alteration products, and the presence of pedogenic features in the upper part of the lower till are comparable to Sangamonian weathering profiles in the midwestern United States, implying that the lower till is Illinoian or older. ?? 1990. |
| Genre: | Article |
| ProdID: | 70016101 |
| Citation Author: | Newman, W. A.; Berg, R. C.; Rosen, P. S.; Glass, H. D. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 159 |
| Citation Issue: | 2 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Quaternary Research |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 12 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | Elsevier |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Pleistocene stratigraphy of the Boston Harbor drumlins, Massachusetts; 1990; Article; Journal; Quaternary Research; Newman, W. A.; Berg, R. C.; Rosen, P. S.; Glass, H. D. |
| Citation Start Page: | 148 |
| Citation Volume: | 34 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Pleistocene stratigraphy of the Boston Harbor drumlins, Massachusetts; 1990; Article; Journal; Quaternary Research; Newman, W. A.; Berg, R. C.; Rosen, P. S.; Glass, H. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0033-5894(90)90027-I |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
| Publisher: | Elsevier |
