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Showing results for tags 'lower cambrian'.
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From the album: My Collection
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From the album: My Collection
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From the album: My Collection
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From the album: My Collection
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From the album: My Collection
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From the album: My Collection
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From the album: My Collection
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Hi there! In my excitement to open a box of fossils gifted to me, I mixed up a couple of labels - hopefully someone out there can help me fix my mix-up @piranha The labels are Paleolenus lanlenoisi and Yunnanocephalus yunnanensis - both from the Lower Cambrian of Yunnan, China. Photo #1: Photo #2: Thanks in advance for your help!!!
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- china
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Oncolites are algae colonies that form spheres or oval shapes as differentiated from Stromatolites which are algae colonies forming cylindrical or tube shapes. I recently acquired three end cuts that contain large oncolite colonies. On average these oncolites measure between a half and three quarters of an inch on the longest axis (11mm to 19mm). Many of these colonies have been preserved in these end cuts with a bit of iron oxide. All three pieces are a polished end cut with cross sectioning of colonies on the cut and polished face and colonies weathering out on the all-natural back side. The oncolites are taxonomically identified as Girvanella sp. These pieces come from the Lower Cambrian Chambless Limestone Formation in San Bernardino County, California, most likely from lower (older) strata of the Chambliss Fm. All pictures were taken with the pieces dry; the end cut individual pictures by camera and the oncolite close-up pictures by digital microscope. End Cut 1 (1114g 120mm by 115mm by 45mm thick) End Cut 2 (486g 165mm by 85mm by 22mm thick) End Cut 3 (529g 120mm by 90mm by 32mm thick) Marco Sr.
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- chambless limestone formation
- lower cambrian
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While visiting family in Arizona and California I was able to figure out where the Marble Mountains trilobite quarry was located. It's not that far off the road system so I figured I'd give it a look see on my drive from central Arizona to Northern California. The location is only about 25 miles out of my way so why not. On my drive north I only had a few hours so this stop was mostly a fact finding trip. The view from the car windshield. The Marble Mountains are the lower hills to the left of center. The quarry area is just to the left of the gap between hills Ok, word of notice...... I DO NOT recommend driving a mustang here. I know my car and have driven many places I shouldn't hehehe. I had to stop about 1/4 mile from the site. Don't need a 4x4 but a little ground clearance is a big help. The road is a bit rocky but that is to be expected. It's about 1.5 miles from pavement to parking area. The site is just below the gray outcrop just to the left of the mountain gap. I arrived just before sunset and found some locals already at the site (you can just make out their truck in middle photo). They gave me some pointers on what to look for as they were leaving and I set to work. For the first hour I was mostly just wondering around seeing what I could see. There were no obvious recent diggings so I was gonna have to do some digging myself. Went back to the car, grabbed a headlight and went to search in the dark. After about 3 hours I packed up and left to continue my drive north. 5 days later I was on my way south back to Arizona. I stopped for a full day of digging this time. Kinda got the basics of the site during this stop. Then back on my way. A week later I was able to slip away for a full 3 day trip just to dig. I was able to spend some quality time on site. It is not a site that you can really hit well in a short time. to be continued......
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From the Eager Fm near Fort Steele, BC, Lower Cambrian. Which one is this? @piranha Sorry for the poor photo, I'll try again if necessary. It is no more than 2cm wide.
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From the album: MY FOSSIL Collection - Dpaul7
Redlichia chinensis Trilobite Balang Formation, Hunan province, China Lower Cambrian Redlichia is a genus of redlichiid trilobite in the family Redlichiidae, with large to very large species (up to 35 centimetres or 14 inches long). Fossils of various species are found in Lower Cambrian (Toyonian)-aged marine strata from China, Korea, Pakistan, the Himalayas, Iran, Spain, southern Siberia, and Antarctica, and from Middle Cambrian (Ordian)-aged marine strata of Australia. Redlichia has a rather flat and thinly calcified dorsal exoskeleton of inverted egg-shaped outline, about 1½× longer than wide, measured across the base of the genal spines and disregarding the spine on the 11th segment of the articulated middle part of the body (or thorax). The headshield (or cephalon) is semicircular, about ⅓× as long as the body, with clear genal spines that are a smooth continuation of the border, that extend backward and outward and curving to be near parallel near their tips, which typically extend to the backhalf of the articulated middle part of the body (or thorax). The thorax consists of 11-17 segments, with the 11th from the front bearing a backward directed spine on the midline. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Redlichiida Suborder: †Redlichiina Family: †Redlichiidae Genus: †Redlichia Species: †chinensis-
- balang formation - hunan province china
- lower cambrian
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From the album: MY FOSSIL Collection - Dpaul7
Redlichia chinensis Trilobite Balang Formation, Hunan province, China Lower Cambrian Redlichia is a genus of redlichiid trilobite in the family Redlichiidae, with large to very large species (up to 35 centimetres or 14 inches long). Fossils of various species are found in Lower Cambrian (Toyonian)-aged marine strata from China, Korea, Pakistan, the Himalayas, Iran, Spain, southern Siberia, and Antarctica, and from Middle Cambrian (Ordian)-aged marine strata of Australia. Redlichia has a rather flat and thinly calcified dorsal exoskeleton of inverted egg-shaped outline, about 1½× longer than wide, measured across the base of the genal spines and disregarding the spine on the 11th segment of the articulated middle part of the body (or thorax). The headshield (or cephalon) is semicircular, about ⅓× as long as the body, with clear genal spines that are a smooth continuation of the border, that extend backward and outward and curving to be near parallel near their tips, which typically extend to the backhalf of the articulated middle part of the body (or thorax). The thorax consists of 11-17 segments, with the 11th from the front bearing a backward directed spine on the midline. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Redlichiida Suborder: †Redlichiina Family: †Redlichiidae Genus: †Redlichia Species: †chinensis-
- balang formation - hunan province china
- lower cambrian
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About 515 million years old, this archaeocyathid shows excellent specimens with both lateral and vertical sections. The internal septa separating the internal wall from the external wall can clearly be seen and the central cavity. Archaeocyatha
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- ajax limestone
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Not 100% sure what it is - could be either a rare Yunnanozoon lividum Hou, Ramsköld & Bergström, 1991, a Hemichordate or - more likely Haikouella lanceolata Chen, Huang & Li, 1999, a Chordate. Even Haikouichthys ercaicunensis Shu, Conway Morris, Han & Zhang, a primitive fish, is still a posibility. Under UV light Reconstruction of Haikouella (from Wikipedia): Reconstruction of Haikouichthys (from Wikipedia): Lit.: Degan Shu, et al. (2003) A New Species of Yunnanozoan with Implications for Deuterostome Evolution. Science 299, 1380. World heritage nomination: Chengjiang Fossil Site.
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- chengjiang biota
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Hello, here are two different specimens I bought 2 – 3 years ago from a trustworthy Chinese dealer via ebay; the specimens were labelled as lower Cambrian (Chengjiang biota): Quiongszhusi Section Heilinpu Formation Locality : Maotianshan They look like graptolites from the order Graptoloidea. However, the earliest graptoloidea are known from the lowermost ordovician. Meanwhile, a pterobranchia from the order Rhabdopleurida was described from the Atdabanian of the Chengjiang biota (Galeaplumosus) as the earliest pterobranchia; however, this is not a graptolite, only a close relative. Thus, it became clear that no real graptolites are known (described) from the Chengjiang biota. This rises several possibilities: (i) the fossils shown here are not graptolites, but something different (but what?) (ii) the fossils are the oldest graptolites/graptoloidea and so far undescribed. However, this seems extremely unlikely since several specimens of that kind were sold and (as is shown on one specimen) they don’t seem to be rare; so it’s very improbable that they were not noticed until now. (iii) the fossils are indeed graptoloid graptolites, but from younger strata (Ordovician, Silurian?) and locality and stratigraphic information are wrong. However, the seller seemed trustworthy to me with a lot of knowledge about the fossils from his area and hunts fossils in the field himself (though I don’t know whether he collected these two specimens himself). Mislabelling may happen more easily if fossils are sold second hand. I prefer (iii), but perhaps somebody may know more about these fossils or where they come from. Thanks! araucaria1959
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- Chengjiang
- Graptoloidea
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