I’m organizing a geological field trip for the Perth region, Western Australia, on 17 March 2012 (find details here). This means lots of research but fortunately there is much excellent geological material available from geological organizations and on the web.

This material, including maps, reports, papers and field guides, is a fantastic resource because the exploration geologists have made careful observations and reported thoroughly and accurately.

There are certain clues I look for that are tell tale evidences of Noah’s Flood, and I find it interesting that the geologists regularly identify and describe this evidence. But it does not alert them to Noah’s Flood because they are not looking for Noah’s Flood. It is not part of their search image.

As an example, I picked up a great field guide called “Geology and Landforms of the Perth Region” by Bob Gozzard of the Geological Survey of Western Australia. It has full-colour maps and pictures, plus a detailed description of how to get to each site, what to see there and other interesting information.

Geology of the Walyunga area. The wind gap can be seen in the field in the flat north-south landscape along the fence between the Archaean outcrops. (image from Bob Gozzard’s field guide.)

My attention was caught by the site he describes at Walyunga, 40 km north-west of Perth in the Darling Range, because of the heading “A wind gap”. A wind gap is a valley cutting through a range. It has been eroded by a stream which no longer flows through the valley.

Wind gaps and water gaps are classic features produced by the receding waters of Noah’s Flood. They are found all over the world (see Rivers erode through mountains).

Wind gaps and water gaps were cut by large flows of water during the early part of the Recessive stage. In the case of a wind gap, as the floodwaters receded the flow of water reduced until it eventually stopped flowing through the gap.

The east-west access road, Walyunga Road, runs through this wind gap which is cut in Archean granite. The high areas to each side of the gap rise more than 100 metres above the road (see Walyunga Walk #6 for the topography in the area). This is how Bob Gozzard, on page 113, describes the processes that carved the gap….

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