archeaids, to random
@archeaids@mastodon.online avatar

The obligatory crinoid stem from Citronelle gravel, west-central Louisiana.

archeaids, to Archaeology
@archeaids@mastodon.online avatar

Modern flakes of the same Oligocene silicified wood from west-central Louisiana. Top views are a flintknapped perforator. This particular "petrified wood" (~50 lb. block) is extremely hard & mostly only suitable for tool production.

BathNature, to uk
@BathNature@ecoevo.social avatar

Two fossil imprints of the shells of Trigonia dug up today near the top of a hill in . These molluscs lived in the Jurassic Period at a time when even the hills in Bath were under water. The rock is (I think) Inferior Oolite.

An imprint of the shell of a Trigonia fossil on a stone

RLIBlog, to Plants Spanish
@RLIBlog@mastodon.social avatar

Piña jurásica fosilizada (Araucaria mirabilis) encontrada en Santa Cruz, Argentina. El paso de 160 millones de años ha hecho que solo sea comestible para los más valientes.

Snowshadow, to science
@Snowshadow@mastodon.social avatar

Did you know fossils were used to make American beer?

Diatomite has a very small particle size, a high porosity, and is relatively inert. That makes it an excellent material for use as a filter. Much of the beer brewed in the United States is filtered through crushed diatomite, known as diatomaceous earth.
Also used to filter syrup, honey. drinking water, juice, swimming pool water and more

Read more about it here:

https://geology.com/rocks/diatomite.shtml

archeaids, to random
@archeaids@mastodon.online avatar

A thin piece of Oligocene silicified wood from west-central Louisiana. The magnified view looks like an abstract painting.

archeaids, to random
@archeaids@mastodon.online avatar

Favosites or Favosites-like tabulate coral dating from the Late Ordovician to Late Permian. Found in crushed dolomite aggregate.

Cormac_McGinley, to ireland
@Cormac_McGinley@mastodon.sdf.org avatar

This collection of Goniatite fossils look horrified to see me 😱
County Clare, Ireland.

Cormacscoast.com Walking tours

Cormac_McGinley, to ireland
@Cormac_McGinley@mastodon.sdf.org avatar

Brachiopod fossils in Shale layers from the Cliffs of Moher, County Clare, Ireland.

Cormacscoast.com Walking tours

image/jpeg

Cormac_McGinley, to ireland
@Cormac_McGinley@mastodon.sdf.org avatar

A fossilized Goniatite Galaxy in a storm tossed stone.
County Clare, Ireland.

Cormacscoast.com Walking tours

TKSivgin, to Reptiles German
@TKSivgin@sauropods.win avatar
archeaids, to random
@archeaids@mastodon.online avatar

Oligocene silicified wood from west-central Louisiana. One side (right) exhibits the warped grain of a branch attachment knot.

ScienceDesk, to science
@ScienceDesk@flipboard.social avatar

An ancient snake in India might have been longer than a school bus and weighed a ton.

AP reports: "Fossils found near a coal mine revealed a snake that stretched an estimated 36 feet (11 meters) to 50 feet (15 meters). It’s comparable to the largest known snake at about 42 feet (13 meters) that once lived in what is now Colombia."

https://flip.it/HvVTqJ

For similar content, follow General Science News: @general

Cormac_McGinley, to ireland
@Cormac_McGinley@mastodon.sdf.org avatar

Fossilized communal coral in this limestone pebble. It would have lived and grown on the floor of the tropical sea that covered this part of the earths surface between 320 million and 360 million years ago.
County Clare, Ireland.

Cormacscoast.com Walking tours

image/jpeg

archeaids, to Archaeology
@archeaids@mastodon.online avatar

Through the microscope eye-piece phone shot of a magnified, thermally-altered, agatized (fossilized) coral flake, Hillsborough Co., Florida.

LiamOMaraIV, to india
@LiamOMaraIV@mastodon.social avatar
Cormac_McGinley, to Geology
@Cormac_McGinley@mastodon.sdf.org avatar

I find Goniatite fossils eroding out of different types of sedimentary stone - these look like hand-drawn hieroglyphs.
County Clare, Ireland.

Cormacscoast.com Walking tours

archeaids, to random
@archeaids@mastodon.online avatar

Views of either axial parenchyma or axial tracheids (or possibly scalaria parenchyma) in the vertical structure of the wood.

archeaids, to random
@archeaids@mastodon.online avatar

Closeup of the rodent gnawed area on the Oligocene wood. 2/

archeaids, to random
@archeaids@mastodon.online avatar

Oligocene silicified wood from west-central Louisiana with hard powdery yellow ochre or fine silt sticking to the surface. Note the ancient rodent gnawing. 1/

tippitiwichet, to photography
@tippitiwichet@mastodon.social avatar

Today I had a ton of chores to do, so I dug my rocks out and took pictures of some of them. Now I guess I will do the chores, but when I sit down I will play with the photos and post the results in this thread. Will probably add to it every now and again for a while.

This piece makes the hippie part of my soul happy, what with looking like yin and yang on one side. About an inch and a half in diameter, smoky quartz.

A close up of the dividing line, showing light reflecting from the planes inside the quartz.
A close up that focuses on the shadowy side, showing the streaks of light through the darkness.
The other side of the stone, showing shadows engulfing the light. This stone is a drama queen.

tippitiwichet,
@tippitiwichet@mastodon.social avatar
tippitiwichet,
@tippitiwichet@mastodon.social avatar

See that tiny swirl by the mechanical pencil lead? I think of it as my spiral goddess. A similar shot is in my Redbubble shop, we have a poster sized print over the bed. Always amazes me to see the poster and know how tiny it is. The crystals are often full of wee rainbows, fun to explore with the jewler's loupe. Like the sphere, it makes me happy in my hippie places. I put jelly bellies in it to nibble on them one at a time when I do the savor and enjoy kind of thing.

A shot close enough to show the center of the spiral, while zoomed out enough to show where the shell fossil falls into patterns of scribbles and loops as it falls into the black matrix.
Closer to the center, showing a better view of the crystals. A few dots are scattered that look a little like dead pixels, they are twinkles from rainbows.

tippitiwichet,
@tippitiwichet@mastodon.social avatar

I love ammonites. Opalization, interesting patterns and textures, full of surprises as you rotate them in the light. Also fun to knit toys of.

And, of course, a tooth from everyone's favorite giant extinct shark I can't spell without looking up.

A more deeply polished ammonite, with bands of creamy yellow calcite and darker brown aragonite, with some caramel colored bands of mixtures in between.
A megaladon tooth, between three and four inches (7 to 10 cm) long.
A closer look at the monster tooth with more dramatic lighting.

tippitiwichet,
@tippitiwichet@mastodon.social avatar
Cormac_McGinley, to ireland
@Cormac_McGinley@mastodon.sdf.org avatar

A Surprised Stone!

The arrangement of Goniatite fossils in this pebble shocked us both apparently 🤣
County Clare, Ireland.

Cormacscoast.com Walking tours


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