Hello Chicxulubists!
In Meteoritics 32-2, 1997, pp. 327-328, M.R. RAMPINO* reviews ‘The Great
Dinosaur Extinction Controversy’ (by C. Officer and J. Page). Among other
things he criticizes, you find the following comments:
Nowhere do they mention:
(1) the persuasive gravity anomaly maps, detailed seismic work, and
recent geologic studies that clearly show a large, multi-ringed basin in
the Yucatan;
(2) the fact that impact melt at Chicxulub (and that is what it is;
it contains silica glass and shocked minerals) has been radiometrically
dated at 65 Ma ago (the same age and composition as the Haiti microtektite
glass) (see papers in Ryder et al., 1996);
(3) that shocked zircons from the K/T boundary layer in North America
have been U-Pb dated and show both an original age of 540 Ma, which is
similar to the Pan African basement rocks beneath Chicxulub, and
(4) a shock reset age of 65 Ma (Krogh et al., 1993).
Any book purporting to discuss the "extinction controversy" should
have included all of this relevant information.
Regards, Bernd