Rock identification

[Captain Z]

Haha, loser. It's only a "meteor" when it's in space: after it lands it's a meteorite (It's not a meteorite)

You ain't seen meteor, rite?

[Elderly Sumo Prophecy]

Haha, loser. It's only a "meteor" when it's in space: after it lands it's a meteorite (It's not a meteorite)

Oh dear. I have brought great shame upon myself here, and no mistake.

[idunnosomename]

space dog egg

[Blue Jam]

They're not rocks, they're minerals.

[Blue Jam]

space dog egg

Was Lisa Stansfield in the vicinity?

[Jittlebags]

Those holes look they've been made by vacated pebbles rather than gas, so that's either a sandy conglomerate, or more likely, as suggested weathered concrete.

[Blue Jam]

The holes are actually glory holes. What you've found is a cottaging hotspot for wasps.

[Tony Tony Tony]

It looks like Vesicular Basalt:

Turns out there is a band called Vesicular Basalt...

https://www.discogs.com/artist/1473955-Vesicular-Basalt

And they are, wait for it....... a rock group.

*Slaps thigh and looks mighty pleased*

[poo]

Found this in Newport? Usk River? Bollocks is it igneous then. Most likely a sedimentary limestone with pits caused by burrowing marine/freshwater animals or chemical erosion.

[bgmnts]

Nah in the Afon Llwyd, which was one of the more polluted rivers in the uk so could well be chemically eroded limestone.

[poo]

Limestone.

[poo]

Likely burrowing invertebrates rather then chemical erosion.

[Captain Z]

Since this thread is here, anybody know what these cylindrical - I assume fossils - are? Creatures, bits of plant, bone, or something less exciting?



Click to embiggen.

[Blue Jam]

Pterodactyl anuses.

[ZoyzaSorris]

Could be segments of crinoid (sea lily) stem. Where was it? I'd say that's a very likely guess, especially if these are somewhere with Paleozoic rocks, so somewhere in the west half of midlands or further north, or wales (perhaps Silurian rocks)

[touchingcloth]

Since this thread is here, anybody know what these cylindrical - I assume fossils - are? Creatures, bits of plant, bone, or something less exciting?



Click to embiggen.

Is the picture the right way round? If the things are pointing down they're stalagmites, and if they're pointing up they're stalactites.

[ZoyzaSorris]

Likely burrowing invertebrates rather then chemical erosion.

Im with poo. nowhere near porous enough for basalt. organic origin id say.

[bomb_dog]

Is the picture the right way round? If the things are pointing down they're stalagmites, and if they're pointing up they're stalactites.

Marlon Brando, Susan Dando, that's how I remember 'em.

[Captain Z]

Could be segments of crinoid (sea lily) stem. Where was it? I'd say that's a very likely guess, especially if these are somewhere with Paleozoic rocks, so somewhere in the west half of midlands or further north, or wales (perhaps Silurian rocks)

South Wales, a cliff face by the sea. So I reckon you could be spot on, thanks.

[ZoyzaSorris]

Oh cool, well yeah I'd say they are 98% going to be crinoid columnals, some rocks of that era (depending where in South Wales could be anything between Cambrian and Jurassic, but with crinoids like these I'd say most likely Silurian, Devonian or Carboniferous) are very rich in them. Nice stuff. I have some nice Jurassic crinoid fossils from the north east coast of Scotland, they have a star-shaped cross-section - whereas the earlier ones from the Palaeozoic tend to have more of the cylindrical form you see here.

Some crinoid columnals, earlier (not mine)


Mine are like these:

[poo]

For real crinoids

[Tony Tony Tony]

Someone slipped a couple of jammie dodgers in there.

[Hand Solo]

EVOLUTION OF GOATSE 1 MILLION YEARS BC

[Captain Z]

I mean they do really look like

Pterodactyl anuses.

[Elderly Sumo Prophecy]

I wish my anus was shaped like the top left two, it would cause some interestingly shaped stool formation. The top right has just taken too much punishment.