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Found 3 results

  1. Hi All, so I had heard about fossilized coral located in the Western Arizona desert near the Colorado River. So we went out there and did some rock prospecting ourselves. The location is La Paz, County south of Parker, Arizona. Namely, the terminal moraine-like hills about 10 miles south-east of Parker, Arizona beyond the Colorado River Indian Reservation. We found a ton of very interesting sponge or coral-like rocks on top of these hills. So this is consistent with a few other reports online about this. First, let me describe this location as it’s somewhat fascinating if you pay special attention. Parker is located next to the Colorado River south of Lake Havasu, Arizona. As you travel southeast of Parker on Highway 95, you will begin to gently gain 100-150 ft in elevation as the Highway climbs through a gentle alluvial fan formation for about 4-8 miles. Then you will begin to see some very odd elongated, east-west sand hills maybe 50-100 ft tall. You won’t think anything of them until you look at an aerial photograph and realize they seem like giant terminal moraines. They’re extremely consistent in shape and placement, like giant wave ripples. We sampled several of these terminal moraine hills. Per geological maps, these moraine hills are composed of an unconformity of top Bullhead Alluvium coating over the below Bouse deposit mounds. You can clearly see this from a few, open cross-sections of these hills, where most of the hill is composed of a sandy material then very oddly layered with a top layer of dense rocks (1/2 inch up to 6 inch size rocks). Now that’s kind of odd. A series of sandy hills composed with a coating of heavy and dense deposits on top? And more interesting is the model where the present day Colorado River may have been formed when a series of lakes formed, filled up, breached and flooded to create subsequent downstream lakes. At this location an ancient Lake Blythe would have formed from presumably a catastrophic flood from a breach of an upper ancient Lake Havasu or ancient Lake Mohave. Think about it, that would probably explain these odd terminal moraine hills with a unconformity of large gravel rocks on top! Wow. It’s anyone’s guess but it sure does seem plausible. So we sampled these hills for several days. Their top gravels are composed of a variety of rocks. But what’s odd is that many sponge or coral like rocks seem to exist in this top layer of Bullhead Alluvium. These have the same appearance as those described downstream in Yuma on this forum. Also, when we were in Lake Havasu City, we found the exact same sponge and coral like rocks there, too. So at least from Yuma to Lake Havasu City and maybe much further beyond. One must wonder where they originated. The Grand Canyon, other canyons, ancient flat areas around the present day Colorado River? But they seem to be very present in presumably flood gravels. There appear to be some different types. Some are coated and show massive eroded pits and areas exposing their mostly gray cores. By coated, the entire specimen is surrounded by a coating(s), so I don’t believe it’s a piece of a eroded deposit layer from a nearby cliff from a flood, etc. Many have elongated shapes, wide on one end and narrow on the other end. Others are gray core matter only, some showing a bit of coating or not, and their cores show very curious patterns that look very sponge or coral like in nature. Their internal patterns seem biological in nature and marine like and can be seen within some of the partially-eroded coated pieces. We also found some gravel rocks with small crinoid fossils and a few specimens that looked like large coral heads. All of these specimens are highly weathered, consistent if they were part of a massive flood deposit. It’s very cool stuff. It’s everywhere in these Bullhead Alluvium flood gravels. It’s so prevalent, I’ve got to wonder if anything specifically has ever been written about it? Granted it was only a few years ago that evidence was uncovered that may indicate that the lower Colorado River area was once an inland sea estuary during the Miocene to Pliocene, before final formation of the modern day Colorado River presumably from a series of breaches. So it begs to wonder what other treasures this area may hold. I attached pictures of some of the sponge and coral like specimens. Size scale shown is in inches. Comments welcome. Cheers, DJ
  2. Hi guys! I am looking for new areas to hunt for rocks and fossils around the KC area. I have been to the Blue river, Kansas river, Cedar creek, Tuttle creek, Perry Lake, Mill creek, and abandoned quarry areas. Anyone have any general locations of where I can find some stuff? I am an avid hunter for all sorts of fossils and rocks (rockhounding is my favorite past time)! I've had the most luck at the Kansas river and Perry lake. Some of my finds include cow skulls, cone coral, shells, agates, vertebrae, and a bunch of druzy quartz geodes and chalcedony. I have included pics of some of my finds - the petrified wood was sanded down and polished up to 3000 grit. Any suggestions are GREATLY appreciated!!!!! Much love KC!
  3. Robski

    Pleistocene Leg Bone?

    Greetings Found this bone in the gravels of a Peace River tributary (in British Columbia) yesterday while hiking. It is clearly old and appears to be a Pleistocene leg bone off some type of smaller ungulate? animal. The bone has had quite a life and has been damaged by gravel reworking. I am a Geologist and identification (if possible) is beyond me so far. Please excuse the picture quality as I am in the field. Be kind haha. Any help would be greatly appreciated. Best Regards Rob
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