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Showing results for tags 'conglomerate'.
Found 21 results
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Matilija Canyon Plant Fossil - Los Padres Mountains, Southern California
ezeemonee posted a topic in Member Collections
Found a carbonized plant fossil in Sespe formation conglomerate stone in the Matilija Canyon area of the Los Padres Mountains of Southern California. Likely something from the Horsetail family or something in the bamboo family. Based on the below report, these rocks are likely from the Oligocene or Eocene periods. The area has mostly Marine fossils but this was probably a land plant that washed out to sea and was deposited along with other flood debris on the shallow sea floor. Some credit on the geology of the area to: BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA V o l . 39 . pp. 1 0 8 7 - 1 1 0 2 D e c em b e r 30.'1928 SIGNIFICANCE OF THE MATILIJA OVERTURN BY PAUL P. KERR AND HUBERT G. SCHENCK (Read before the Society December SO, 1927)
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Fingers crossed, I think there's a real fossil in this mess! I accidentally chipped the part I think is a fossil, bone or shell maybe, with my tile nippers trying to chip away the bigger rocks in the conglomerate-- the nippers are for sherd crafts ONLY from now on! However, the pattern of lines in the part in question is as it was when I found it in the lower canal along the Delaware river near Pt. Pleasant, PA. My husband, King of Pareidolia, thinks it's a turtle. I'm not going to see things I can't hypothesize on, I'm here instead.
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This is a digital microscope photograph of a 4mm clast in a conglomerate rock from Franklin County, Alabama. We have recently purchased property in this area and I am trying to learn about the rocks and minerals. We are in the Tuscaloosa Group, Gordo Formation and our county is a Super Site for the large amount of limonite-geohtite and siderite found there. Around 300 iron mines are also in this one county, so the rocks I am finding are high in iron oxides, as you can see in this example. I am intrigued by this one clast - this rock was broken in half and the clast is mirrored on both sides that broke. Is there any way to identify it by the same or appearance? Thanks! Ramona
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Found on Florida beach. Asphalt or fossil conglomerate? Thanks for looking.
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My son asked me yesterday if there's anyway to see what's inside the conglomerate rocks we picked up this summer. I told him that short of breaking them open the answer is likely no, but according to this website, conglomerate is typically made up of silica, calcite, or iron oxide. All three of these substances can be dissolved in the right mixture, but I'd assume that some of the embedded rocks would be destroyed as well. Has anyone ever tried doing this? Any advice?
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Please help me ID this component of a conglomerate block found in Romania, Harghita county. Compared to the rest of pebbles and matrix, it is outstanding in every way: size, shape, internal structure. There is no reaction to vinegar and all considered, I would say it is a piece of chalcedony. Did the silica replaced wood, bone or not a fossil? Thank you! Diameter is ~45 mm, lenght ~90mm.
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Found these two rocks earlier in Big Creek by my place in Iron Co. MO. they look as though they are made up almost entirely of tiny plant & animal fossils. Each rock is about 6"x4"x2".
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Show us your reworked fossils or fossil-bearing breccia/conglomerate
FranzBernhard posted a topic in General Fossil Discussion
I am starting this topic because of this one: Would you like to show off your examples of reworked fossils still located in younger matrix or conglomerate/breccia with fossil-bearing clasts. I am quite eager to see some nice examples. I have only one, most of you may already know this : One of the clasts contains Eifelian corals. Thanks you very much!! Franz Bernhard
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Any ideas as to what this might be? Thinking could be wood remnants, maybe petrified or partially so? Northwest PA, lots of glacial debris in area.
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In some sandstone caves on my property there are layers of conglomerate stones laid into otherwise fine Hawkesbury sandstone. In amongst these there are hollow egg shape structures, some broken off but one in particular in intact but with a hole in it showing that it is hollow. They are all embedded in the ceiling of the cave. the one featured is about 4 inches long. Can some one tell me what they are likely to be?
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Here's one of my "works". Again, found this when I was about 12 yrs old and painstakingly picked it clean with dental tools and thought it might be some sort of root system. Now, I wonder if its just a conglomerate? Thoughts on this as well appreciated! Though it looks like the "grey" roots are depressions, they are rounded, raised areas. I'll try taking some more outside. Maybe not even a fossil? Stay healthy! thanks! Bone
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When I first looked at this rock I thought it was a bit of concrete, but once I cleaned it up and looked at it with my macro lens I discovered a very different world. I am used to seeing fossiliferous limestone, but the fact that this rock has some completely smooth sides baffles me. Is it just another example of the wonders of limestone? See next post for the size. Found in Huntsville, Alabama. Thanks! Ramona
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I'm still a rookie.... if I'm going out to look at formation X I like to read about what to expect from that time period. Recently I was reading about Pottsville formation, which includes conglomerates and molasse, deposited during nearby orogeny. That got me thinking.... by definition conglomerates and molasse will contain "chunks" that are older than the formation itself. So could these hunks have atypically older fossils? For example, say a fossiliferous rock forms in the silurian, then later in the carboniferous pieces of that rock are moved and deposited elsewhere, and still later along comes a blundering fossil nerd wannabe like myself, is dating fossils in such a layer ever a bit like picking through a nut-filled brownie? Younger fossils in the "cake" matrix and maybe older ones in the "walnuts"? Or do the processes involved pertty much destroy the older fossils before the brownies finally come out of the oven?
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I am risking the possibility of a huge embarrassment here, but I am wondering about this large rock. I at first assumed that it was a large chunk of concrete but then I started looking more closely. It is located in a creek bed with no other concrete around it. We have a massive amount of fossilifferous (sp?) limestone rocks in our yard, so I began reevaluating this one... I am not able to climb down to look at it closely, so this photo will have to suffice. Is this actually a chunk of concrete or is it a conglomerate rock with fossils in it? If it is concrete I will put my tail between my legs and slink off into the far distance. We live in Huntsville, AL. Thanks! Ramona
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I’ve found two different rocks like this, both remind me of conglomerate. I’ve found a dark blue stone and this orange one. I need help identifying it. They seem pretty plentiful around my house in southeast Washington. Any help works. Thanks!!
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Hi all, I took my Mom to lunch at Frenchy's Dunedin, Florida and than took a walk on the Causeway. I found this unusual piece that I was going to toss but kept it. It is about 3" by 2" by 2" and looks like granulated brown sugar with crystals (I think sandstone) under the eye loop. It appears to have about 4 shell casts on top with some of the seashell still embedded in the layers. On top it looks like a turtle with its head sticking out?? There is a dozen or more shell molds or imprints all over this conglomerate of sediment. What do you think of this find? Is it considered a fossil? Thanks in advance!
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I have found a number of fossiliferous paleozoic stones of various sizes, types, and quality, in a cretaceous conglomerate layer. I have included a picture of some of them. I rather like them because, although the fossils are not very high quality, it is neat to think about how they have been fossilized and eroded out multiple times. I was thinking about running them through a rock tumbler to polish them, but I am concerned that the hardness of the fossils compared to the rock might present some sort of issue. Does anyone have any thoughts on why this may or may not work?
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I found this fragment in a Cretaceous conglomerate. I am still trying to figure out the name of the formation, but it is either from a river bottom or sea shore. My first thought when I found it was a piece of turtle shell, but upon closer examination, it reminds me more of fish skull fragments I have found in other formations. I was hoping some of you might be able to provide some other perspectives. The piece is ~12 mm long, ~10 mm wide, and ~2 mm thick. It is slightly convex with a slight bumpy texture on the outside, although mostly eroded away, and some sutures at the very edge on the inside.
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So, okay, I know more or less what I have here: some pretty shell conglomerate and coral that grew on a well-eaten shell, with just a little bit of bryozoan growing inside the lacey shell holes. Found in Avon, OBX, North Carolina. The question is, how old? I'm guessing pretty recent, but by how much? When did coral last grow off the Outer Banks?
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From the album: Angelica's
My boyfriend found this in a river/creek bed in Lassen National Forest in northern California. Other than that, I know very little about it. I've posted in the ID section asking for more information (http://www.thefossilforum.com/index.php?/topic/61172-fossilized-seashell-lassen-national-forest/#entry652184)--any information is welcome! -
In southeast Utah, a gravel road leads from the highway to Mexican Hat, a rock formation in the Permian Halgaito Formation: The 'brim' of the 'sombrero' is 60 feet across. Anyway, the road continues along the San Juan River: As we walked up the slope high above the river, we began to find many rounded pebbles on the bench: There was a diverse variety of rock types represented: One was this beautiful piece of conglomerate: So what are the four generations? The fourth is this alluvial deposit on the bench. It was emplaced at some point in the late Cenozoic before the river had cut down to its present level. The third generation is the conglomerate, which is Proterozoic or possibly early Paleozoic. The drainage basin of the San Juan River is quite large, so the pebble's provenance would be difficult, if not impossible to track down. The second generation is represented by the clasts within the pebble. Most striking is this red fragment of banded ironstone formation (BIF): These BIFs are almost exclusively Precambrian. They formed at a time when excess dissolved iron in sea water was being oxidized and incorporated into sediments. The first generation is represented by whatever deposits were eroded to provide the sediment for the BIF. It's even possible that the various components were involved in additional generations that left no trace.
