Abstract
Initial 143 Nd/ 144 Nd ratios of clastic sedimentary rocks in the Ordovician Taconic and Sevier foreland basins increase with decreasing stratigraphic age. This shift in isotopic composition reflects an increased influx of juvenile sediment to both basins. For the Taconic basin, geologic and isotopic data are consistent with the juvenile sediment being derived from uplifted Grenville crust. For the Sevier foreland basin, there are few geologic constraints on source regions, but the similar shift in isotopic ratios with time suggests a similar increase in the influence of juvenile sources such as exotic terranes. -from Authors
Original language | English (US) |
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Pages (from-to) | 983-986 |
Number of pages | 4 |
Journal | Geology |
Volume | 23 |
Issue number | 11 |
DOIs | |
State | Published - 1995 |
ASJC Scopus subject areas
- Geology