2014 UPDATES of MY AMATEUR IMPACT CRATER/STRUCTURE EXPLORATIONS

DECEMBER

Clearwater East, Quebec – REVISED TIME OF IMPACT

The age spectra corrected for the trapped argon component and inverse isochron plots consistently yielded ages around ~460–470 Ma for ECL, reproducing the Ar/ Ar results by Bottomley et al. (1990) and contradicting an earlier Rb–Sr age of 287 ± 26 Ma. The Ar-Ar dates obtained from four different melt samples across the melt sheet favor an Ordovician age for the East Clearwater Lake impact and impact-induced hydrothermal overprint.

NOVEMBER

Rock Elm, Wisconsin

OCTOBER

Merewether, Labrador – PROBABLE SINKHOLE

St. Martin, Manitoba – NEW DOCUMENTED TIME OF IMPACT

⁴⁰Ar/³⁹Ar age of the Lake Saint Martin impact structure (Canada) – Unchaining the Late Triassic terrestrial impact craters

Martin Schmieder, Fred Jourdanb, Eric Tohvera, Edward A. Cloutisc

PLANET VS CRATER SIZE – BINARY ASTEROID BREAKUP

Abstract

The Earth is immersed in a swarm of Near Earth Asteroids (NEAs) capable of colliding with our planet, a fact that has become widely recognized within the past decade. The first comprehensive modern analysis of the impact hazard resulted from a NASA study requested by the United States Congress. This Spaceguard Survey Report (Morrison 1992) provided a quantitative estimate of the impact hazard as a function of impactor size (or energy) and advocated a strategy to deal with such a threat. (Morrison 2007)

JUNE

EXTINCTIONS VS Possible Impact Relationship

MAY

VIDEO of SOME IMPACT CRATERS/STRUCTURES WE EXPLORED

APRIL

Touchwood Hills, Saskatchewan

Touchwood Hills Provincial Park, Saskatchewan – a very large circular structure with Last Mountain Lake to the west and Quill Lakes to the north. These arcuate lakes “may” be resting on the rim of a large impact structure.(RADARSAT-1 Mosaics).

UPDATE ARCHIVES

“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