BRENT IMPACT CRATER – SIDE NOTES AND REFERENCES

Side notes;

1. Beavers are very quiet at night! Many of the little critters brushed by my tent while I was “trying” to sleep. They smell of wet dog!!

2. The National Research Council of Canada’s Algonquin Radio Observatory (ARO)

Algonquin radio observatory.
The Brent Impact Crater is a short 1.5 hour flight north of Ottawa. On the way the circular white shape of theAlgonquin Radio Observatory at Lake Traverse is very obvious. I’m dating myself, I had a tour through the complex when it was operational in the early 1970s.

3. Alsever Lake compared to Brent impact crater. Alsever Lake (image LEFT) is located at the southern boundary of Algonquin Park. It is similar in appearance to the Brent impact crater (image RIGHT) with its two distinct bodies of water forming a circular pattern. Alsever has a central “land mass” like Brent and what appears to be circular outline. This is best viewed on some topographical maps.

Alsever Lake – NON-IMPACT
Brent Crater – IMPACT

 

4.Relative sizes

Relative sizes of Holleford, Brent and Deep Bay Impact Craters.

References

[see – METEORITE]

Chavez, R.E., An optimisation study of gravity data from the Brent Crater. First Break, Feb. 1986.

Brent Dalrymple, Radiometric Dating Does Work! Reports of the National Center for Science Education

Grieve, R. A. F., Cintala, M. J., A method for estimating the initial impact conditions of terrestrial cratering events exemplified by its application to Brent Crater, Ontario. Proceedings Lunar and Planetary Science Conference 12th, pp. 1607-1621. 1981.

Grieve, R. A. F., Dence, M. R., Principle characteristics of the impactites at Brent Crater, Ontario, Canada (abstract). Lunar and Planetary Science IX, pp. 416-418. 1978.

Dr. Michael R. Dence and yours truly at a 2012 Sigma Xi Companions in Research meeting, Ottawa. Dr. Dence was prime on impact crater research within the Canadian Shield, 1961-81. He was one of the few indiviuals responsible for transforming terrestrial impact crater research into a respectable and scientific discipline of planetary science.

Grieve, R. A. F., The melt rocks at Brent Crater, Ontario, Canada. Proceedings Lunar and Planetary Science Conference 9th, pp. 2579-2608. 1978.

Grieve, R. A. F., The petro-chemistry of the melt rocks at Brent Crater and their implications for the conditions of impact (abstract). Meteoritics, v. 13, pp. 484-486. 1978.

Grieve, R.A.F.,Robertson P.B., IMPACT STRUCTURES IN CANADA: THEIR RECOGNITION AND CHARACTERISTICS Journal of the Royal Astronomical Society of Canada, V69, 1-21, Feb 1975

Grieve, R.A.F.,Robertson P.B., Shock attenuation at terrestrial impact structures Lunar and Planetary Institute, 1977

Hodgson, John H. 1994, The Heavens Above and the Earth Beneath, A History of the Dominion Observatories – Part 2 1946-1970.

Meen, V.B., CHUBB CRATER – A METEOR(sic) CRATER, Journal of the Royal Astronomical Society of Canada, V44, 169-180, 1950.

Millman, P. A., Liberty, B.A., Clark, J.F., Willmore, P. and Innes,M.J.S., The Brent Crater. Ottawa Dominion Observatory Publication, v. 24, 43 p. 1960.

Palme, H., Grieve, R.A.F. and Wolf,R., Identification of the projectile at Brent Crater, and further considerations of projectile types at terrestrial craters. Geochimica et Cosmochimica Acta, v. 45, pp. 2417-2424. 1981.

Shafiqullah, M., Tupper, W.M. and Cole,T.J.S., K-Ar ages on rocks from the crater at Brent, Ontario. Earth and Planetary Science Letters, v. 5, pp. 148-152. 1968.

TAGLE, R. and HECHT, L., Geochemical identification of projectiles in impact rocks. Meteoritics & Planetary Science Volume 41, 26 JAN 2010.

Earth Impact Database

 

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