More on metors and hot spots

[Ralph Lindberg <dragonsl@gilead.connected.com>]

   My prime source for this idea comes from Alt, Sears and Hyndman 1988
Journal of Geology v96 pg 647-662. Terrestrial maria: The origins of
large basalt plateaus, hotspot tracks, and spreading ridges. 
   This article discusses a large meteorite impact in southeastern Oregon 
about 17 M year ago. The evidence is rocks in this area that show the 
over pressure fractures that occurs in metor impacts.
   They also (Alt and Hyndman) talked about this and the Daccan Traps in 
their book "Roadside Geology of Idaho".
   One interesting sidebar is the sudden change in northwest climate that 
occured at about this time and lasted during the most active period of 
the Columbia flood basalts. In a nut shell the climate got warmer and 
wetter for a couple of million years. The question then comes...did the 
active flood basalts cause the warming, or was it a coincidence?

   Yes we also have evidence fo other metororic impacts causing flood 
basalts..look at a full moon.


Ralph Lindberg N7BSN                        more hobbies then time
Ellen Winnie N7PYK                          TTFN
email => dragonsl@hebron.connected.com
Members SCA, ARRL, AMSAT, PS Lacemakers, MW Microwave, KCFMS, CS-VHF, and 
Kitsap ARES