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.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.
A valley of this size was obviously cut by a major river, but it is now abandoned and is preserved as a wind gap between the two present-day river systems. The steam occupying this valley, Spring Creek, is clearly an underfit stream, far too small to have eroded such a large area—which was most likely cut by the Sawn River at a time when it was significantly larger than today and westerly flowing. About 50 km west-southwest of Walyunga, in the Quinns rock no, 1 offshore well, there is further evidence for a Swan River of significant size flowing west from Walyunga. Quilty (1974) described the presence of poorly sorted, silty, quartzose sandstones … [which is] unusual in that it appears to be the only example of coarser material found offshore.
In other words, the river once flowed westward carving this gap into the foothills of the Darling Range. Its channel can be identified extending some 20 km offshore. Sediments in this offshore channel are conspicuously coarser than usual.
This vivid description jumps out to me as a description of the receding waters of Noah’s Flood, very late in that event during the Channelized flow phase. Clues such as these point to areas of fruitful research for biblical geology.