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This is "petrified wood", a terrible term for what is technically called permineralization. Biogenic materials such as wood or bone have a fair amount of small-scale porosity. After burial, the porosity of wood or bone can get partially or completely filled up with minerals as groundwater or diagenetic fluids percolate through. The end result is a harder, denser material that retains the original three-dimensionality (or close to it). The most common permineralization mineral is quartz (SiO2). Sometimes, fossil wood and bone have been permineralized with radioactive minerals such as black uraninite (UO2) or yellowish carnotite (K2(UO2)2(VO4)2·3H2O). Some fossil bones permineralized with cinnabar have been reported (García-Alix et al., 2013, Lethaia 46: 1-6).
Permineralized wood can have microscopic anatomic details preserved, but some fossil wood has no internal structure remaining (in such cases, the fossil preservation style is "replacement" - if quartzose, it's been silicified).
Stratigraphy & locality: unrecorded
Fossil Beetle (Buprestidae fam.) in the Green River Formation. This beetle, now extinct, is similar to modern jewel beetles. This specimen lived during Eocene time, about 50 million years ago. These fossils are unusually well preserved in laminated limestone precipitated from calcium-rich waters. The limestone is interbedded with many thin layers of volcanic ash and mudstone. Fossil Butte National Monument. Near Kemmerer, Lincoln Co., Wyo.
Fossil sandstone of church wall at Frisby on the Wreake in Leicestershire. Middle Lias sandstone with lamp-shells - possibly Terebratulids
When Fossil, a part-bone part-stone member of the Earth Tribe is converted to Final Evolution's Diamond Tribe, he becomes a massive, toothy creature with a prehensile tongue. There are really no other Gormiti shaped like this guy, which just adds to the awesomeness!
My parents purchased this for me when I was a kid, living in Germany.
It came from a coal mine near Aachen (possibly the Anna Mine).
Most fronds are nearly obliterated, but there is leaf that is quite a bit larger than the rest.
Fossil Seeds (unknown species) preserved in the Green River Formation. Detailed identification of seeds is often impossible because the fragile parts of the rest of the plant necessary to make an ID do not survive burial and fossilization. The Green River Formation is a laminated limestone precipitated from calcium-rich waters. The limestone is interbedded with many thin layers of volcanic ash and mudstone. Fossil Butte National Monument. Near Kemmerer, Lincoln Co., Wyo.
These are a few of the fossils in the rock we put in our front flowerbed, until now, just a rock that was cleared from the field. Best viewed large.
Guadalupe Mountains National Park, Texas, fossil on the Permian Reef Trail. (Photo courtesy of Heather Walborn)
I added my wedding ring for giving you an idea of the scale.
After a little research, and according to the mineral we found them in (black marl), these are 200 millions years old.
My goodness.
Oct 25th 2009
An unusual Ammonite specimen -iron pyrite replacement. Unfortunately I chipped it while cleaning it up. :^(
I found this fossil on the shores of Kielder reservoir many years ago. It's called Stigmaria, which is a form genus for tree roots of Carboniferous coal forest Lycopod trees such as Sigillaria and Lepidodendron. Generally they are quite common in the Carboniferous sandstones, coals and mudstones of Northumberland. However, this one shows in quite beautiful detail, the vascular system. I've never seen one like it since and it was a chance find.
Fossil Flower (unknown species) preserved in the Green River Formation. Flowers are very rare in the fossil record. The taxonomy of fossil flowers is highly uncertain. Detailed identication is usually impossible because the fragile parts necessary to make an ID do not survive burial and fossilization. The Green River Formation is a laminated limestone precipitated from calcium-rich waters. The limestone is interbedded with many thin layers of volcanic ash and mudstone. Fossil Butte National Monument. Near Kemmerer, Lincoln Co., Wyo.
Fossils are a major industry in Erfoud, and practically every working surface in our Hotel was marbled fossils.
A fossil trilobite from the Lower Devonian (Altas Mountains, Morocco - Djbel Issimour). That makes it about 400 million years old. More here: www.fossilmuseum.net/Fossil_Galleries/TrilobitesMorocco/D...
Fossil Ant (Formacidae fam.) preserved in the Upper Eocene Florissant Formation about 34 million years ago. Florissant Fossil Beds National Monument. Teller Co., Colo.
my fossil watch mandy got me for christmas 06. the pictures i tried to take do not do show how sweet the face actually looks.
Title: Clay over the Upper Oolite fossils
Creator: James Sowerby (1757-1822) for William Smith (1769-1839)
Description: Depictions of characteristic fossils found in Clay over the Upper Oolite stratum.
Source: Smith, William, 'Strata Identified by Organized Fossils, Containing Prints on Colored Paper of the Most Characteristic Specimens in Each Stratum', London: W Arding, (1816-1819).
Smith was the first person to recognise the importance of fossils in identifying strata of equivalent age, thus enabling rocks to be correlated across country. His work as a surveyor and engineer involved him travelling up and down the country during which he accumulated a large collection of ‘characteristic’ fossils of the British strata. By 1815, his financial problems (caused in part by a bad investment in a quarrying concern in Bath) led to the sale of his precious fossil collection to the British Museum. This publication is part catalogue/part explanation of his collection and theories, the illustrations (by the natural history illustrator James Sowerby) printed on coloured paper to correlate with the geological colouring on his 1815 map of England and Wales.
Format: Hand coloured engraving
Image reference: 23-18
To purchase a copy of the above image, visit our website at: www.geolsoc.org.uk/Library-and-Information-Services/Pictu...
To find out more about the Library of the Geological Society, click here: www.geolsoc.org.uk/library
Fossil Flower (unknown species) preserved in the Green River Formation. Flowers are very rare in the fossil record. The taxonomy of fossil flowers is highly uncertain. Detailed identication is usually impossible because the fragile parts necessary to make an ID do not survive burial and fossilization. The Green River Formation is a laminated limestone precipitated from calcium-rich waters. The limestone is interbedded with many thin layers of volcanic ash and mudstone. Fossil Butte National Monument. Near Kemmerer, Lincoln Co., Wyo.
Fossil Tales is a small display, that brings together a range of fossils from National Museums Scotland's collection to explore some of the myths and early uses for fossils.
This display is showing 7 April - 10 September 2017.
This is one of the photos I shot yesterday at the museum of a femur of an ancient extinct anteater that once lived on Java. One or more of the photos will be published in a book that is co-written by one of the palaeontologists of Naturalis.
It may not look spectacular to you, but it is a very rare specimen.
Fossil Seed (Menispermaceae fam.). These plants lived during Eocene time, about 50 million years ago. This fossil is preserved in the Green River Formation, a laminated limestone precipitated from calcium-rich waters. The limestone is interbedded with many thin layers of volcanic ash and mudstone.Fossil Butte National Monument. Near Kemmerer, Lincoln Co., Wyoming.
Driving and hiking around Fossil Butte, in southwestern Wyoming, enjoying the nature after a visit to the namesake national park. The Green River Formation, which makes up Fossil Butte, was deposited in a lake that existed at this location during the Eocene (about 50 million years ago). Sedimentary and environmental conditions favored the preservation of the remains of millions of fishes, amphibians, reptiles, insects, plants in one beautiful Lagerstatten, a deposit where fossil remains are highly concentrated.
Fossil Butte National Monument
Kemmerer, Wyoming