Presqu'île - Hypervelocity Impact Crater

Alternate Names
Local Language
Coordinates 49° 42' 42" N; 74° 49' 29" W
Notes
  1. Near Chapais, Quebec.
Country Canada
Region Quebec
Date Confirmed 1990
Notes
  1. Confirmed based on shatter cones occuring up to 60 cm long in fine-grained basalt and rhyodacite (Higgins and Tait, 1990).
Buried? No
Drilled? No
Target Type Crystalline
Notes
  1. Archean-aged tonalite and metabasalts of the Abitibi greenstone belt.
Sub-Type Basalt, Tonalite
Apparent Crater Diameter (km) 15 km
Age (Ma) <2729
Notes :
  1. <2729 Ma based on stratigraphic age constraints and the high extent of erosion (Higgins and Tait, 1990).

Method :
  1. Stratigraphy
Impactor Type Unknown

Advanced Data Fields

Notes

Erosion
7
  1. Eroded to below original crater floor.
Final Rim Diameter
Unknown
Apparent Rim Diameter
15 km
  1. On the basis of a new relationship to derive the apparent diameter using maximum shatter cone extent, the diameter is 15 km (Osinski and Ferriere, 2016). Previous apparent diameter was 24 km. Semi-circular lake 7 km in diameter. 12 km estimate based on the distribution of shatter cones; the only evidence of impact (Higgins and Tait, 1990).
Rim Reliability Index
2
  1. No obvious crater-form.
Crater Morphology
Complex
Central Uplift Diameter
km
Central Uplift Height
Unknown
Uplift Reliability Index
Structural Uplift
Unknown
Thickness of Seds
Target Age
Precambrian
Marine
No
Impactor Type
Other Shock Metamorphism
No
Shatter Cones
Yes
  1. Shatter cones occur at different locations within massive fine-grained basalt and rhyodacite. Cones are up to 60 cm long, but typically 10 to 20 cm long. Cones have apical angles of 90° and their apparent position is vertical (Higgins and Tait, 1990). No complete cones were found. Diameter of the structure was constrained using the occurrence of shatter cone; shatter cone occurence can be incorportaed into a circle with a diameter of 6 km (Higgins and Tait, 1990). "It's diameter is very poorly constrained by the presence of shatter cones, which occur over an area ~6 km in diameter" (Grieve, 2006). "Shatter cones and shatter cone surfaces occur within massive meta-basalt and rhyodacite 5 km east of Lad de la Presqu'ile" (Grieve, 2006). "The cones have apical angles of ~90° and their apparent position is vertical" (Grieve, 2006).
Planar Fractures
No
Planar Deformation Features
No
Diaplectic Glass
No
Coesite
No
Stisovite
No
Crater Fill
  1. Crater deeply eroded. No information regarding impactites.
Proximal Ejecta
Distal Ejecta
Dykes
Volume of Melt
Depth of Melting

References

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M D Higgins, L Tait (1990) A possible new impact structure near Lac de la Presqu'ile , Quebec , Canada, Meteoritics 236, p. 235-236

D B Reid (2000) The Presqu'ile crater in Quebec: The 1999 UCL expedition, Journal of the British Astromnomical Association