Geological Reflections by Robert M. Langdon [*!* Images 4 Pictures] [Map] ABOVE: Approaching Jackson Hole and the Grand Teton range from the E: looking S towards the Great Salt Lake in late afternoon from 39,000 ft. (9/78) BELOW: The main wall of the Rockies in NW Montana: looking N towards Glacier Park (US) and Waterton Park (Canadian Rockies) from 37,000 ft. I grew up on the high plains of Colorado at the foot of the Rocky Mountains. This land is so arid that the prairies are almost desert in nature. It is doubtful that, in the 1920s, many people had ever tramped around them extensively. I spent a lot of time wandering around areas out there which looked as though no one had ever passed by but me, the coyotes and the rattlesnakes. Two of things that impressed me at that age were (1) the stratification of the land as it was exposed in the arroyos and gorges and (2) the carpet of small, round, dark red stones - literally thousands and thousands of them, ranging from tiny peas to as much as an inch in diameter. My elders told me that the strata were layers of limestone - the little skeleton bit at the bottom on long-ago oceans - and the pebbles were meteorites. This, of course, was not much explanation, but it sufficed for the time. It didn't explain how those oceans got up to 5,000 feet, where I was standing, or the mountains rising another 5,000 feet just to the west, and it didn't explain where the meteorites came from; so I was left wandering about all that. Next, of course, I wondered why the sun was hot, and the story in the ' 30s was that it was burning hydrogen - and I knew by then that hydrogen burned with oxygen and made water, and I thought, there must be a hell of a lot of water around somewhere, and where did the oxygen and hydrogen come from. Those were the days when it was generally believed that we knew just about everything about everything, except for maybe a little of this and that around the edges, and that John Maynard Keynes had shown us the way out of the depression into eternal prosperity. In the summer of 1936, when I was 16, I got a job rip-rapping a bend in the small river out west of town. To get the stone for the rip-rap, we went up on the bluff above the river - maybe 200 feet - and scraped away an overlay of about a foot of dusty clay to expose a layer of limestone about 18 inches thick. This layer was flat on top and bottom, of uniform thickness, and seemed to extend for miles along the bluffs above the river and miles north until it was exposed again at the next stream gorge. We would drive a 4-foot crowbar under the layer, stick in two or three sticks of dynamite, and blow enough cracks to make a few loads of rip-rap. The next layer down was a flat, hard-packed layer of the same dusty dry clay as the original overlay. So, I had to wonder how that could have come about, the little skeleton-drifting-down bit just didn't seem to fit what I was looking at. Later, I went to live in Salt Lake City and fly over the Rockies, the Sierras, the Cascades, and that enormous arid desert extending from the Canadian border down into Mexico. Before discussing this area, let me diverge to the big island of the Hawaiian group, also called Hawaii. This island is the only one of the chain which is still actively volcanic. The island chain sits squarely in the wet northeast trade-winds. As a result of the winds and their effect on the islands' mountains, the northeast sides of the islands are favoured with immense amounts of rain - the peak on the north island, Kanuai, is the wettest place on earth - and the southwest sides are almost arid, receiving rain only during the winter months when the trade-winds slack off and "Kona" storms come in from the other direction. There is a perimeter highway around the big island; it crosses many old lava flows. The state of Hawaii has placed signs on each of these flows indicating the year of the flow. It is most astonishing how quickly, on the wet side, the lava flows begin to break down into soil which will support plant life, and how slowly this occurs on the arid side. Very old flows on the dry side look much fresher or younger than much more recent flows on the wet side. Now, back to the mainland. The western mountain chains of the Sierra Nevada and the Cascades effectively squeeze out almost all the moisture from the Pacific Ocean as it flows in on the Prevailing Westerlies. The vast inland plateau, ranging around 4,000 feet above sea level, gets very little rain or snow, ever. Therefore, the breakdown of the formations proceeds at a slow rate, and the lack of plant life of any luxuriant extent allows the basic surface features of the land to be visible, especially from the air. All through the area there are great black blotches on the land - these are lava flows which did not come from volcanoes, as the volcanoes are all located well to the west, not far from the coast. These flows welled up "in situ", apparently from great cracks and fissures in the crust. These flows appear much fresher - younger - than flows on Hawaii which are known to be far more recent - the rain effect. Most areas of the earth are much more lush than this area and any scars from relatively recent catastrophes tend to be quickly eroded or hidden by vegetation. Here in western North America, the whole pattern is open and there to wonder about. Now, about the Rockies. If a force from beneath is applied to a sheet of brittle material - for instance, a sheet of ice - the ice will crack, and edges will be tilted upwards. If no other force is applied, there will be just that sort of tilting and nothing else. However, if an additional side force is applied, the broken edges will push up over each other and a series of upthrust tilted edges will appear. The Rocky Mountains, especially in the area from Flathead Lake east towards Great Falls, Montana, present this exact picture. These ridges are very sharp; they tilt with their faces to the east and their slopes to the west; and as you look from east to west each succeeding ridge is pushed up the back of its predecessor, almost to the same altitude. This is obviously not an upthrust from below, but a push from west to east - gigantically, suddenly, and quickly. There is no gradualism here, and it is painfully obvious. So there is that, too, to wonder about. Over east of Great Falls, Motana, well east of the main mountain chains, just to the north of a separate group of hills, is a perfectly circular formation. This formation is forested, but is surrounded by circular ridges, giving, from the air, the same impression one gets from looking at moon craters; there is another one very similar to it just northwest of Helena, Montana. The original settlement of Salt Lake City lies at an elevation of 4,200 feet above sea level in the floor of the valley and only slightly above the level of the Great Salt Lake. As the city grew, the residential areas were built to the east of the old city on a bench several hundred feet above the valley, before the abrupt rise of the Wasatch Mountains. This East Bench was the shoreline of what is known geologically as Lake Bonneville - a giant freshwater lake which once covered immense portions of this inland basin. This lake is supposed to have existed a long, long time ago, and to have emptied suddenly down through the Snake and Columbia River systems to the Pacific at Portland, Oregon. Well, there exists ample evidence, from camp sites along this shoreline, that people lived here when the lake was here. I lived on this East Bench for a long time, and it was always a matter of interest to us how the deer came down to the Bench for water still - even though that lake had disappeared a long time ago. As I mentioned, Salt Lake City lies at 4,200 feet above sea level; Reno, Nevada, lies at about 4,500 feet, at the foot of the Sierra Nevada on the east side. Now between Salt Lake and Reno lie numerous ranges of mountains; however, none of these presents a solid wall or barrier between the cities: it is possible to fly between without having to climb to cross any of the ranges. Northeast of Reno is a large freshwater lake, Pyramid Lake, and southeast of Reno another, Walker Lake. South of Salt Lake, near Provo, Utah, is Utah Lake - another freshwater lake. Since this area, at valley level, is almost all at the same elevation, I like to think that Bonneville Lake once filled the entire basin as one lake, rather than the two prehistoric lakes as postulated. There is a lot more I have wondered about, but the thing about it is, Dr. Velikovsky was the first person who offered me a small glimmer into all these things I was wondering about. He gave me an idea about all those red pebbles, about how those ridges could look the way they do, now that lava welled up through the crust, and how the earth might have cracked like an eggshell. I don't think it is a bad thing to wonder about these things, or to find out what other people wonder about and what they find out. But I do think it would be a bad thing if all I was allowed. to believe was what was spoon fed to me by an elitist group who, as an act of faith, believe they have all the answers. People who have all the answers worry me a great deal. _________________________________________________________________ \cdrom\pubs\journals\workshop\no5\03geolg.htm