We have found a few sponges on the Holderness that I would like the ID for.
Because of the nature of the Holderness being made up of several different boulder clays deposited during the last ice age all of these fossils were found loose on the beach (erratics).
These sponges probably came from the cretaceous chalk of the Flamborough area.
The first specimen is 4in high by 3in across with a hole in the center and was found by myself at Holmpton.
here is mine. I found it in mallorca and it is neogene in age. I think mine could be one of those large things which has a hole in the middle, but it is comparable to your second picture.
These are nice sponges, though I would be unable to comment on which part of the chalk formation they came from. I would agree and call them Siphonia koenigi which can often be found in the Yorkshire chalk. Most specimens are found preserved in the interior of flint nodules which obliterates the the spicular structure so these are nice to see.
Hello UK Fossil Guy
Thank you for the id, I have some hollows in flint nodules but I have not taken much notice of them although they do resemble sponges.
Picked this one up a while ago on the Holderness, very unusuall for our area.
Flint matrix and very heavy.
Hi UK Fossil Guy
I was very lucky last year when I found this cast of the inside of a sponge comming out of the boulder clay at Dimlington on the Holderness, it was just inside/on the boulder clay and I think if it had become an erratic in the beach system it would not have survived more than one high tide.
It is a flint/chalk cast of the inside of a sponge were the water was circulated with some casts of tubes still attached.
Tabfish, that is a remarkable specimen! Congratulations; it is very well preserved so fine details can be made out. You don't see so many of them in the area I do most of my collecting - might have to make a few trips around your neck of the woods.
All the best,
Thank you Thomas
I have seen another specimen but it had been in the beach system, probably not for a long time but they are very delicate and quickly degrade.
I will post some images of the echinoides we have found on the Holderness when i get the time.
All of our finds are quite random although you do seem to find certain things in certain areas but on the whole you can find most fossils, rocks and minerals all along the Holderness.
Hope we bump into each other.
A couple of images of the echinoides that I have found on the Holderness.
I have been very lucky over the years because on the biggest tides, beach conditions and wind direction etc I have on a few occasions come across 'chalk rafts' that stick out of the boulder clay, they are very white in colour and contain what you would expect in chalk.
There are some very nice specimens among those - I see a number of different species. Have you found any regular echinoids or other echinoderms in the chalk?
Here is one of my best, a crinoid from the Yorkshire chalk -
I will take some more images in the day lite, hopefully tomorrow.
You have a very nice Marsupites ? there.
When you find pyritic ammonites on the Holderness they usually last for a very long time but some sponges Rhizopterion? for example you may as we'll leave on the beach because you know it won't be long before it starts to rot.
I recently lost a fantastic Laosciaddia plana ? It was big very heavy and rotted soon after bringing it home, see previous post for images.
A corner in the garden were I put pyritic fossils to keep an eye on them when they have started to rot, unfortunately they usually don't come back into our collection.
One of my son's found this Crinoid head, but it wont prep because the matrix surrounding it is Flint.
Great find though!
Got it wrong! it's the other end - a holdfast.
Found at Mappleton, I was wondering if this is a Sponge?
Any help to I.D the specimen is welcome.
It's in chalk and about 2.5in across.
Clearing out my shed I came across this chalk fossil, so could someone help me with the name of this specimen and what its.
I fancy trace fossil.
Some burrows have a funnel-shaped entrance, before becoming parallelish-sided.
- http://www.geocities.ws/arturchahud/paleoicno.html (search for 'Monocraterion)
- http://www.southampton.ac.uk/~imw/jpg-Kimmeridge/10KM-Rhizocorallium-Rope-Lake-Head-m.jpg (Rhizocorallium) [the whole page is rather long and hence slow to load - http://www.southampton.ac.uk/~imw/Kimmeridge-Rope-Lake-Head-Geology.htm]
- http://viewsofthemahantango.blogspot.com/2012/03/conostichus-trace-fossils.html (Constrichus, though that one has no burrow below the pit)
But I wouldn't rule out coral.
A cross-section would be useful...
I have been to bussey today to take some more images of the chalk fossil, so may i say sorry but i will do some more images when i can!
Sorry to see you have had problems with your health, I hope you are feeling better.
I too have struggled with my health after a bad accident and many months off work and more months 'getting back on my feet'.
I hope you fill your ruck sack were ever you go and the bad weather doe's not stop you.
Went collecting twice last week on the Holderness, and another time with my four and a half year old grandson (sand castles, rocks etc).
Found quite a bit including what looks like a partial fish.
Did you go collecting ?
Interesting; hope your fish bit preps well. I did not manage to get out until yesterday but found some nice specimens. Here is a rather large ammonite, 45cm. Did not come out as good as I would have liked but should look ok when prepped.
Got this sponge from a fossil friend, it was found on the Yorkshire coast by him.
I think it is a Seliscothon planum? from the Upper chalk, Flamborough, am i ok with the i,d.
It measures about 100mm and has very little pyrite buy the look of it.
Interesting and very nice specimen Tabfish. I am not 100% sure on the ID - Seliscothon planum is a possibility, but it could equally be Laosciadia plana which is often found at Flamborough. Sponges are not my strong point with their complex internal structure. Thanks for posting this one.
I found this specimen at Aldbrough on the Holderness coast a while ago, could any one help with it's I,D please.
Probably from the cretaceous chalk of the Flamborough area and found as an erratic.