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Tanglewood Hollow

Large Orthoceras


Like their modern relative the chambered nautilus, Nautiloids had a soft body with tentacles that emerged from a hollow shell filled with gas for buoyancy. Unlike the Nautilus, which is admired for the beauty of its spiral shell, the Nautiloid shell came in a variety of shapes. Orthoceras (which translates as “straight horn”) Nautiloids had long, cone-shaped shells, and must have swam like torpedoes through ancient seas.  These distinctive black and white specimens come from Morocco, and are often quarried in slabs teeming with fossil Orthoceras shells. The originally hollow chambers of the shell have filled in with white calcite crystals, and in some pieces the siphuncle, a tube that ran through all the chambers of the shell, is visible. 

These specific specimens are from the Ordovician Period and are approximately 465 Million Years Old.  Their fossilized shells are common and are used as decorative stone all over the world.

Fossil A: Measures 7" in length.  Has been repaired by a professional, so does have an imperfection.
Fossil B: Features a full-length orthoceras.  Measures 8" in length.
Fossil C: Features two orthoceras.  Measures 8.25" in length.
Fossil D: Features three orthoceras.  Measures 7.75" in length.  Stunning specimen!

Style: C- 8.25" in length

Pickup available at 93 Storrs Street

Usually ready in 4 hours

Style: C- 8.25" in length

Product information

All orders are processed within 4 business days (excluding weekends and holidays) after receiving your order confirmation email.  Orders are shipped from Concord, New Hampshire. You will receive an email notification when your order has shipped.  

Please understand that holidays and periods of high traffic such as the Christmas season may cause delays in the shipping and delivery of orders.

Please also keep in mind that delivery timeframes are not guaranteed at this time by any carrier. Country-wide and regional delays should be expected with all carriers, so please place time-sensitive orders well in advance.  

Time in transit is estimated from the day that the package is delivered to the carrier.

Domestic Shipping Rates

Shipping charges for your order will be calculated based on weight and will be displayed at checkout.  Orders will be shipped via USPS First Class, USPS Priority Mail, or UPS Ground.

We do not provide estimated delivery timeframes for Armed Forces addresses. Please plan on at least several weeks for delivery.

International Shipping

We unfortunately no longer offer international shipping in the wake of international shipping policies and standards changing in ways that our company is unable to uphold. Thank you for understanding.