TY - JOUR
T1 - Near-K/T age of clastic deposits from Texas to Brazil
T2 - Impact, volcanism and/or sea-level lowstand?
AU - Keller, Gerta
AU - Stinnesbeck, Wolfgang
PY - 1996/5/1
Y1 - 1996/5/1
N2 - Near-K/T boundary clastic deposits from Texas, Mexico, Haiti, Guatemala and Brazil, often described as impact-generated tsunami deposits, are stratigraphically below well-defined K/T boundary horizons and appear not to be causally related to the K/T boundary event. Stratigraphic evidence indicates that their deposition began during the last 170-200 kyr of the Maastrichtian, coincident with a major eustatic sea-level lowstand that lowered sea level by as much as 70-100 m. Clastic deposition ended a few tens of thousands of years before the K/T boundary during a rapidly rising sea level. The presence of glass in clastic deposits in Haiti, northeastern Mexico and Yucatan suggests that the sea-level lowstand coincided with a time of major volcanism or pre-K/T boundary bolide impact.
AB - Near-K/T boundary clastic deposits from Texas, Mexico, Haiti, Guatemala and Brazil, often described as impact-generated tsunami deposits, are stratigraphically below well-defined K/T boundary horizons and appear not to be causally related to the K/T boundary event. Stratigraphic evidence indicates that their deposition began during the last 170-200 kyr of the Maastrichtian, coincident with a major eustatic sea-level lowstand that lowered sea level by as much as 70-100 m. Clastic deposition ended a few tens of thousands of years before the K/T boundary during a rapidly rising sea level. The presence of glass in clastic deposits in Haiti, northeastern Mexico and Yucatan suggests that the sea-level lowstand coincided with a time of major volcanism or pre-K/T boundary bolide impact.
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U2 - 10.1111/j.1365-3121.1996.tb00757.x
DO - 10.1111/j.1365-3121.1996.tb00757.x
M3 - Article
AN - SCOPUS:0030455062
SN - 0954-4879
VL - 8
SP - 277
EP - 285
JO - Terra Nova
JF - Terra Nova
IS - 3
ER -