New (U-Th)/He Zircon and Apatite Ages for the Lake Saint Martin Impact Structure (Manitoba, Canada) and Implications for the Late Triassic Multiple Impact Theory
Abstract
New (U-Th)/He single crystal zircon and apatite ages for the 40 km Lake Saint Martin impact structure suggests that this crater is too now old to be included in the postulated ca. 214 Ma Late Triassic multiple impact event.
- Publication:
-
40th Annual Lunar and Planetary Science Conference
- Pub Date:
- March 2009
- Bibcode:
- 2009LPI....40.2004W