Crater Explorer – My exploration and documentation of craters (presently only on this planet).

PERSONAL EXPLORATIONS
MY AMATEUR ADVENTURES IN CRATER EXPLORATION;
VIDEOS OF “STUFF” I HAVE BEEN UP TO IN THE PAST LITTLE WHILE
JOURNAL of the RASC – PINGUALUIT IMPACT CRATER;
SMITHSONIAN – PINGUALUIT IMPACT CRATER;
SKY NEWS – CANADIAN IMPACT CRATERS;
CANADIAN CRATERS;
2001 CRATER TOUR QUEBEC CANADA

EARTH SCIENCE PICTURE OF THE DAY

“How bright and beautiful a comet is as it flies past our planet– provided it does fly past it”ISAAC ASIMOV

Comet Hyakutake, taken by Peter Ceravolo March 17, 1996 with film. Later processed by Debra Ceravolo.

“All things originate from one anotherand vanish into another… according to time”~ANAXIMANDER“We, all of us, are what happens when a primordial mixture of hydrogen and helium evolves for so long that it begins to ask where it came from.” Jill Tarter“Civilization exists by geological consent …. subject to change without notice.”

– W. Durant –

EXTINCTIONS:
ARCHEAN: 4.0 – 2.5 BILLION;
PROTEROZOIC: 2.5 BILLION – 542 MILLION;
HADEAN: 4.56 – 3.8 BILLION;
CAMBRIAN: 542 – 488 MILLION;
ORDOVICIAN: 488 – 443 MILLION;
MISSISSIPPIAN: 359.2 – 318 MILLION:;
PENNSYLVANIAN: 318 – 299 MILLION;
PERMIAN: 299 – 252.2 MILLION;
TRIASSIC: 252.2 – 199.6 MILLION;
JURASSIC: 199.6 – 145 MILLION:
CRETACEOUS: 145 – 65.5 MILLION:
PALEOCENE: 65.5 – 55.8 MILLION ;
OLIGOCENE: 33.9 – 23 MILLION;
MIOCENE: 23 – 5.3 MILLION;
PLIOCENE: 5.3 – 1.8 MILLION;
PLEISTOCENE: 1.8 MILLION – 10 THOUSAND;
HOLOCENE – 10 THOUSAND – PRESENT;
K-Pg & Tr-J GEOMORPHOMETRY COMPARISONS;
TWO EXTINCTIONS AND THE DINOSAURS;

References

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Brookfield M.E. 2006, THE GREAT ARC OF EASTERN HUDSON BAY, CANADA: PART OF THE LARGEST MULTIRINGED IMPACT BASIN ON EARTH? (Geological Society of America)

Caty, J.L. et al, 1976, A new astrobleme: Ile Rouleau structure: Canadian Journal of Earth Sciences, v.13.

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

Dence, M. R. 1976 The Manicouagan impact structure. NASA Spec. Pub.

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Dietz, R.S. 1947, Meteorite impact suggested by the orientation of shatter cones at the Kentland, Indiana, disturbance, Science 105, 42-76.

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Dressler et al 1995, New Observations at the Slate Islands Impact Structure, Lake Superior NASA CR-205312

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French, B. M.,The importance of being cratered:The new role of meteorite impact as a normal geological process. Meteoritics & Planetary Science 39, Nr 2, 169–197. 2004.

French, Bevan M. 2005: STALKING THE WILY SHATTER CONE, Impact Field Studies Group, Vol.2. Winter 2005.

French, Bevan M. & Koeberl, Christian 2009; The convincing identification of terrestrial meteorite impact structures: Department of Paleobiology, Smithsonian Institution, Washington, DC, USA

Gibson, H.M. & Spray, J.G. 1998, Shock-induced melting and vaporization of shatter cone surfaces: Evidence from the Sudbury impact structure, Meteoritics and Planetary Sciences, 33, 329-336.

Grieve and Head, 1983. R.A.F. Grieve and J.W. Head, The Manicouagan impact structure: An analysis of its original dimensions and form.

Grieve R.A.F. & Robertson P.B. 1975, IMPACT STRUCTURES IN CANADA: THEIR RECOGNITION AND CHARACTERISTICS, JRASC February 1975.

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Grieve, R.A.F. 2006, Impact Structures in Canada (Geological Association of Canada).

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Gordon R. Osinski, and Ludovic Ferrière Shatter cones: (Mis)understood?, Science Advances 05 Aug 2016

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Rayl, A.J.S. 2008; Hayabusa: Itokawa Beckons as Japan’s Spacecraft Searches for Places to Touch Down”.

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