We need some more info:
- location (country, county, town or locality or grid reference)?
- in situ or loose (if loose, near an outcrop of similar rock)?
- what do you know about fossils at the locality (you may have collected and IDd other specimens)?
Hi Chris. Here is my trigonocarpus nut finds. Your find is something to be proud of. Where I live, and I would guess anywhere else, they are very Hard to find.
Forgot about this post didn't get back to Mike's response (sorry).Thanks for your id Dan.Tabfish got this at my workplace scout moor quarry near Rochdale. Don't find much but any thing which looks out of the ordinary I always have a look. Thanks again..
You make me do some detective work...
I have found a description of your quarry here
The grid ref does not help (local map?)
But I see it is run by Marshalls Mono,
which has an address on Manchester Road,
where there is a quarry. Unfortunately, that seems to be Fletcher Bank Quarry.
But now I have found the wind farm and reservoir, I think I have your quarry (just to the west of the wind farm and NNE of Fletcher Bank Quarry).
The quarry is almost completely in the Carboniferous 'Rough Rock' sandstone, ~313m yrs old.
To quote from the BGS:
"These rocks were formed from rivers depositing mainly sand and gravel detrital material in channels to form river terrace deposits, with fine silt and clay from overbank floods forming floodplain alluvium, and some bogs depositing peat; includes estuarine and coastal plain deposits mapped as alluvium."
The Rough Rock 'is the most extensive of all of the sandstones of the Millstone Grit Group'
It is documented in C. S. Bristow's
'Sedimentology of the Rough Rock: a Carboniferous braided river sheet sandstone in northern England',
Geological Society of London, Special Publications, 1993, 75:291-304
So, having got the context...
Your specimen contains unspecified fossil plant fragments, and the lump probably is, as Dan suggests, a Trigonocarpus nut. So, to answer your original question: yes, it is 'some kind of seed'.
Largely arising from Dan's questions, we have discussed Trigonocarpus nuts quite often recently here:
I think Dan's our local expert on these now!
When 'having a look' in future, keep an eye out for trace fossils as well.
The description here is not actually about your particular quarry, but the setting is close, so the fossils are likely to be similar
Always keep an eye out Tabfish and will post if I find anything. I posted some pictures recently from an abandoned quarry called birtle so it does really interest me I just went for a nosey round. Thanks Mike for your time and effort alot of interesting facts. Yeah the quarry is near the turbines a bleak place in winter.Thanks to everyone again for your replies..