The largest intact asteroid impact crater in the U.S. lies completely buried under the verdant
cornfields of north-central Iowa, near a town called MANSON. The crater is about 23 miles in
diameter, making it about 30 TIMES larger than Meteor Crater in Arizona.
Some scientists believe that the impact produced a tidal wave, or TSUNAMI, in the shallow
Cretaceous Sea that covered much of the area at the time. They theorize that such a tsunami
deposited a very special layer of sediment called Crow Creek, which can be found today exposed
in isolated patches in South Dakota. The Crow Creek sediment has been proven to contain the
tell-tale shocked quartz and feldspar fragments blasted from the Manson asteroid impact. Because
the crater itself is completely buried and there is none of the impact rock available at the surface,
the Crow Creek fragments are the ONLY AVAILABLE remnant of this Earth-rattling event.
Real scientifically validated Crow Creek material in a 1 INCH square perky, with informational
label. You receive about 8 grams.
Larger samples are available. Call 563-542-9038 for further information.