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The Race Against Time
The Brule fossil site is doubly difficult to detect and work on because it is located in the intertidal zone (the area exposed only at low tide) and therefore covered by water much of the time. In order to even see most of the fossils, the site must be cleaned of the mud and silt that was deposited by the last tide. The problems created by the tide and erosion are a very big part of the Brule story. New techniques had to be developed to make moulds and casts of the trackways before they were covered by the next tide and eventually worn away. Scientists and volunteers race against time to study and preserve as much of this precious fossil site as possible before it is lost to the ocean. |
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