A few responses:
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Small catastrophes do not prove that there are not any larger ones, just as regular meals do not prove there is nothing like a Thanksgiving dinner.
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Intensity can be substituted for time. In other words, a lot of geological change can take place during high intensity events that might otherwise be attributed to millions of years.
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If there really was a worldwide flood, what would we expect to see? Billions of dead things (fossils) buried in rock layers laid down by water all over the earth. And what do we observe? Just that.
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There are many massive geological features that cannot be explained by local events, and for which uniformitarian geology has no good explanations. Here are a few:
Quartzite rocks transported by water from their source, the Rocky Mountains both to the east and the west, across several mountain ranges. To the west, they range from lower British Columbia to southern Oregon–up to 800 miles of travel. They were not pulverized into sand because of their hardness–7 on the scale of hardness. They are often deposited with sand, the remnants of softer rocks.
How do we know they were transported by water? Well, they are rounded. And the larger, boulder sized rocks (which didn’t travel as far) have percussion marks all over them, showing that they were knocked around intensely during the transport. Some are found on the top of mountains.
What does it take to move these rocks by water? The speed of the water must be at least 80 miles per hour, faster than ordinary floods. From research and calculations, the water must be at least (from memory–it could be deeper) 50 feet deep. The larger rocks are moved along the bottom, crashing into each other creating the percussion marks. The smaller ones may bounce up and travel a bit higher and farther.
So how were they transported over mountain ranges by water? Obviously, they weren’t. That means that there must have been rapid vertical tectonics that lifted these ranges after the transport of the quartzite. The mountains rose and the valleys sank—in the Grand Tetons and Jackson Hole, more than 30,000 feet! And on the top of the Tetons, there are remnants of the thousands of feet of sedimentary rocks that were once there. How were they removed, and where did this rock go?
Inselbergs and karst rising above planation surfaces, many of them, found on all continents (except probably Antarctica). All the sediment around them, sometimes a thousand feet, have been eroded away. Yet by uniformitarian reasoning, they have stood for 100,000 or even millions of years without eroding, and generally with very little talus or rock debris at their bases. But after long periods of time, surely they would erode away and/or have a lot of talus at the base.
Planation surfaces of the size we see all over the world are not being formed today. They are often dated using fossils and radiometric dating at tens of millions of years old, often 50 million years old and sometimes over 100 million years old. Yet in all this time, they have remained flat, with very little erosion.
What about the continental shelves extending into the oceans, and the underwater canyons extending from the seaward side? How does uniformitarian geology account for these? A worldwide catastrophic flood can.
All of these can be explained by intense geological activity over a short period of time, a year long catastrophic flood, combined with rapid vertical tectonics, but not by uniformitarian geology–presently observed processes acting over millions of years and modest catastrophes.
How do uniformitarian earth scientists explain one ice age, let alone many? There are many hypotheses given, but none really work. Michael Oard has done significant and extensive research and calculations and has come up with an excellent explanation for a post Flood ice age, briefly explained, warmer oceans due to extreme volcanic activity and the heat from vertical tectonics. As we all know, there is very little moisture in the air at lower temperatures, and yet massive amounts of snowfall over many years are needed for enough snow for an ice age. 500 years or so are required for the estimated depth of glaciation cover. And year round cooler land masses are also needed for an ice age so that the snowfall does not melt each summer.
Lower land mass temperatures were due to particulate matter and gases from extensive volcanic activity over several years following the Flood—remember the “mini ice age” in the 1800s due to lower temperatures due to volcanic activity.
This also explains why the higher latitudes around the Arctic Ocean in Alaska and northern Europe and Asia were not covered by ice; the Arctic Ocean was much warmer than it is today.
And btw, if there were many ice ages, why are their geographical islands in the middle of the ice sheets where there is no evidence of ice coverage? These “islands” missed being covered not just once, but many times over millions of years?
Two related observations: First, it is untrue to say that creationists just pick out anomalies. These are huge issues. It is also untrue to say that flood geologists have not done significant field work and research to come up with better explanations; they have done this work and research.
Second, no one has all the answers–not flood geologists or uniformitarian geologists. So having all the answers is not something we can expect from either research project, either uniformitarian or Flood geology. Having said that, however, with all the research done by uniformitarian geologists over the past one hundred years, it is telling that there is still so much that can’t be explained by uniformitarian geology, but which can be fairly easily explained (after much hard work and research) by flood geology.