Geology Superstore
Geology Superstore

Promicroceras planicosta In Matrix

£12.50 ex VAT

• Geological Age: Jurassic period, lower lias, obtusum zone, 200 to 174 million years old.
• Location: Charmouth, Dorset, UK.
• Family: Ammonoid
• Species: Promicroceras planicosta

Promicroceras planicosta amomnite fossils which exhibit excellent morphological features, deep ribbing, evolute shells with open umbilicus, these samples are from the Jurassic period and were collected from Charmouth in Dorset, UK, 25 mm in size they are suitable for collectors, their shells have become agatised during the fossilisation process and so exhibit a pearly lustre and are still set within a limestone matrix. Supplied in a card tray with a label.

  •  Delivery & Return


    We ship to all 50 states, Washington DC.
    All orders are shipped with a UPS tracking number.
    Always free shipping for orders over US $200.
    During sale periods and promotions the delivery time may be longer than normal.


    Elessi will accept exchanges and returns of unworn and unwashed garments within 30 days of the date of purchase (14 days during the sales period), on presentation of the original till receipt at any store where the corresponding collection is available within the country of purchase.

    Your return will usually be processed within a week to a week and a half. We’ll send you a Return Notification email to notify you once the return has been completed.
    Please allow 1-3 business days for refunds to be received to the original form of payment once the return has been processed.


    Give us a shout if you have any other questions and/or concerns.
    Phone: +1 (23) 456 789

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Promicroceras planicosta are an extinct species of ammonite which lived in the lower lias of the Jurassic period, between 200 to 174 million years ago, they are well known and sought after due to their evolute shells, which exhibit strong, deep ribbing. The shells also show an open umbilicus (centre of the coil), though this cannot always be viewed, as the centres of ammonoid shells are often the most fragile part. They can be found across Europe in marine strata, particularly abundant within other Jurassic rocks in the South west of England. One of the main sought after points of these ammonite fossil specimens, particular from the UK is that the shells have been agatised during fossilisation, giving them a pearly lustre. Overall, the shells are not too large, our stock exhibits the shells still within their matrix, sizes of the actual specimen are between 15 to 25 mm in diameter, where as the size of the matrix will vary. Each piece will come supplied in a card tray with an information label.

Weight 450 g

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