The Silver Pit Crater was formed around 35 million years ago scientists announced in August 2002. It was smaller than the one that killed the dinosaurs but
it is very important to us because it is not only
the first impact crater identified in or near Britain, but it’s a
Yorkshire meteorite crater!
The meteorite would
have been travelling at about 25 miles per second when it struck the
Earth, and was about 120 metres across and weighed around 2 million
tons, it crashed into what is now the North Sea about 60 miles off
the Yorkshire coast, this I think is close enough to be classified as
Yorkshire!
This impact would
have devastated the area around what is now Britain, northern Europe
and Scandinavia. The crater which is called the Silver Pit Crater is
about 1.5 miles wide. At the time that the meteorite struck this area
was still under about 150 metres of water, the crater is now located
about 0.5 miles under the sea bed covered by shale and sand. The name
Silver pit comes from a long valley called the Silver Pit Valley
which is in the bed of the North Sea.
It was discovered in
2002 by a company looking for new oil and gas fields. While looking
for these resources the oil and gas companies produce
three-dimensional maps which tell them whether or not it is worth
drilling in the area. It was during the course of this routine
exploration that the data collected indicated that there was a crater
below the sea bed in the North Sea. The 3D map shows a spectacular
set or rings sweeping out around the crater.
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| Silver Pit Crater |
There are
suggestions that the ring like structures of the crater that have
been discovered are rare on craters discovered on Earth, however they
do appear to be similar to those that are seen on Europa and Calisto
two of the large icy moons that orbit Jupiter. These are moons that
scientists speculate could be places where life might exist in our
solar system. Europa and Calisto are two of the four large moons that
were discovered by Galileo back in 1609 when he first used his
telescope to look at the night sky. The other two moons he discovered
are Io and Ganymede.
It all depends on
what is under the icy surface of these moons, and we can’t be
certain yet, however there could be could be some kind of layered
briny ocean, scientists believe that under the Silver Pit crater,
there are layers of shale. It could possibly be that these layers
are causing these ring features both on Jupiter’s moons and around
the Silver Pit crater. The theory being put forward is that is that
it is this layering effect below the surface that causes these rings
to appear. I wonder if it is possible that by studying this 35
million year old Yorkshire crater scientists can try to better
understand what is going on under two of the large moons of Jupiter
which are over 480 million miles away!