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Posts treating: "friend Gery"

Sunday, 29 March 2015

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Belemnitella mucronata cephalopod from France 

Views of the Mahantango [2015-03-29 09:01:00]  recommend  recommend this post  (159 visits) info

 Jurassic; FR
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My friend Gery sent me some specimens of Belemnitella mucronata from the Toarcian stage aged (Jurassic) rocks in Vendee Department, France. They are small and show the typical round cross sections. Had they not been labelled I would not be able to tell them apart from many other Belemnite fossils. These are just the internal "skeletons" of squid like animals that were surrounded by soft tissue and mostly were used to anchor

Triarthrus eatoni trilobites from the Utica shale 

Views of the Mahantango [2015-01-06 09:01:00]  recommend  recommend this post  (114 visits) info

 Ordovician; US,FR
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Following up on my previous post, these are Triarthrus eatoni trilobites from the Utica shale near Little Falls, NY, (Ordovician, Darriwillian stage). These are frequently found disarticulated and thus are most likely molts rather than post mortem burials.Molt with the cranidium separated from the rest of the body. Note the free cheeks still in place beneath the "floating" cranidium.This specimen is missing the free cheeks or librigena.Both of the above specimens were purchased at my local [...]

A pair of Pleurotomaria sp. Gastropods from France 

Views of the Mahantango [2014-04-23 09:01:00]  recommend  recommend this post  (89 visits) info

 Jurassic; FR
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Here are a pair of Pleurotomaria sp. gastropods that come from a quarry near Evrecy (southwest of Caen), France that excavates rock from the Bajocian stage of the Jurassic. The rock is very distinctive with a tan color that is speckled with small red hematite nodules.The first fossil is Pleurotomaria textilis still attached to the matrix. Then we have Pleurotomaria granulosa. The shell is not as tall as P. textilis but it still has that distinctive decoration along the whorls.Thanks to my [...]

Cyclothyris vespertilio brachiopod from France 

Views of the Mahantango [2013-03-14 08:01:00]  recommend  recommend this post  (94 visits) info

 Cretaceous
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Among the many beautiful fossils that I have received from my friend Gery in France are these Cyclothyris vespertilio from near Sarthe, France. I like them because they show evidence of Beekite (a microcystalline form of quartz similar to Chalcedony) replacement of the original shell. The small circular shapes that you see embedded in the shells are the result of the Beekite replacement. Specimen #1Pedicle valve  Anterior  Brachial valve Posterior ProfileSpecimen #2Pedicle [...]

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Views of the Mahantango [2012-11-03 08:01:00]  recommend  recommend this post  (50 visits) info

 Jurassic
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What looks like a starfish fossil is, in fact, a trace fossil. It represents where a starfish burrowed into the sediment to hide and rest or in search of prey. This fossil comes from the middle Jurassic (Callovian stage) from La Voulte-sur-Rhône in France. This site is considered a Lagerstatte due to the fine preservation of echinoderms like starfish, brittlestars, crinoids etc. along with many other animals where the soft tissues have been preserved by pyrite or phosphate.This fossil was sent [...]

Burmirhynchia hopkinsi 

Views of the Mahantango [2012-08-24 09:01:00]  recommend  recommend this post  (71 visits) info

 Jurassic
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Another fine brachiopod from the Jurassic (Bathonien) aged cliffs near Luc Sur Mer, France is Burmirhynchia hopkinsi. This species is related to Burmirhynchia decorata but is smaller and flatter.Group shot of several specimensPedicle valveAnterior (front)Brachial valvePosterior (Rear)ProfileThanks to my friend Gery for sending me these fossils.

Nummulites from france 

Views of the Mahantango [2012-03-06 09:01:00]  recommend  recommend this post  (82 visits) info

 Paleogene
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I received some interesting fossils of Nummulites that my friend Gery sent me as part of a trade recently. They are interesting fossils of a single celled creature which belongs to a groups called foraminiferians. Most forams, as they are known, are small and rarely produce shells larger than 1/4 inch but some get much larger with the largest known being up to 20cm (about 8 inches) across. Nummulites can get close to that size (up to six inches in Eocene aged rocks of Turkey), but the specimens [...]

Zeilleria humeralis 

Views of the Mahantango [2011-09-13 09:01:00]  recommend  recommend this post  (72 visits) info

 Jurassic
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Zeilleria humeralis is another Jurassic (Oxfordian) age brachiopod and this one was found at the beachside cliffs of Villers sur Mer, France.PedicleFrontBrachialBackProfileThanks go out to my friend Gery for sending me this

Gibbithyris semiglobosa 

Views of the Mahantango [2011-08-30 09:01:00]  recommend  recommend this post  (59 visits) info

 Cretaceous
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Among the beautifully preserved fossils that are found within the Cretaceous (Turonian) aged chalk at Ault, France is the brachiopod Gibbithyris semiglobosa. Thank you to my friend Gery for sending me this fossil. Below is a picture, that Gery took, of the cliffs near Ault and they are reminiscent of the cliffs of Dover in England and in fact may very well be the same

Regoria dufrenoyi 

Views of the Mahantango [2011-08-02 09:01:00]  recommend  recommend this post  (122 visits) info

 Cretaceous
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Here is another interesting Pelecypod from the Campanian (Upper Cretaceous) of Charente, France. This was sent to me by my friend Gery in one of our fossil exchanges. I like the wrinkled look of the shell as though it were an exam paper that a student received a bad grade upon and had crumpled it up and tossed it

Haugia variabilis Ammonite & Plagiostoma giganteum Pelecypod 

Views of the Mahantango [2011-07-07 09:01:00]  recommend  recommend this post  (27 visits) info

 Jurassic
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These next couple of pieces come into my collection courtesy of my friend Gery over in France. The first piece is an exquisite Haugia variabilis Ammonite and it has a partial Plagiostoma giganteum Pelecypod on the back.The suture lines are very nicely preserved.Here is the partial Plagiostoma giganteum A few months later he sends me another Plagiostoma giganteum but this one is a whole valve! There is even another valve underneath the first one.I like the pattern on the shell of what are, I'm [...]
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