McHugh, Cecilia M G; Snyder, Scott W; Miller, Kenneth G (1998): Major oxides for tektites and for conglomerate clast of the Upper Eocene ejecta-bearing layer of ODP Hole 150-904A (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.711490, Supplement to: McHugh, CMG et al. (1998): Upper Eocene ejecta of the New Jersey continental margin reveal dynamics of Chesapeake Bay impact. Earth and Planetary Science Letters, 160(3-4), 353-367, https://doi.org/10.1016/S0012-821X(98)00096-X
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Abstract:
Evidence for the Chesapeake Bay Crater as the source for New Jersey continental margin ejecta is provided by fine-grained tektites and coarse-grained unmelted ejecta. The Upper Eocene ejecta deposit, now demonstrated to be part of the North American strewn field, occurs on the New Jersey continental margin at Ocean Drilling Program (ODP) Sites 904 and 903. The mineralogy, major oxide composition of the ejecta materials, and biostratigraphic age of the enclosing sediments link the origin of these ejecta to the recently recognized Chesapeake Bay impact crater, located only 330 km away. Sediments associated with the ejecta provide information about the dynamics of impact events. The 35-cm-thick ejecta-bearing layer can be subdivided into three subunits that indicate a sequence of events. Bottom subunit III documents sediment failure and deposition of gravel-sized fragments, middle subunit II records deposition of abundant sand-sized ejecta by gravity settling, and upper subunit I contains a 12-cm-thick sedimentary deposit containing rare silt-sized tektites and evidence of waning currents. These events are interpreted by linking sediment deposition to seismic ground motion and subsequent tsunami waves triggered by both the Chesapeake Bay impact and slope failures.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 38.863400 * Longitude: -72.768100
Date/Time Start: 1993-06-30T22:30:00 * Date/Time End: 1993-07-04T06:30:00
Minimum ORDINAL NUMBER: 1 * Maximum ORDINAL NUMBER: 31
Event(s):
150-904A * Latitude: 38.863400 * Longitude: -72.768100 * Date/Time Start: 1993-06-30T22:30:00 * Date/Time End: 1993-07-04T06:30:00 * Elevation: -1134.0 m * Penetration: 576.7 m * Recovery: 557.55 m * Location: South Atlantic Ocean * Campaign: Leg150 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 62 cores; 576.7 m cored; 0 m drilled; 96.7 % recovery
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
663 data points