Asteroceras obtusum Ammonite Fossil Lower Lias Dorset UK COA Genuine Specimen Black Ven Marls Charmouth Jurassic Coast
£ 150.00
Genuine Asteroceras obtusum Ammonite Fossil from Charmouth, DorsetThis Asteroceras obtusum ammonite fossil is a genuine Lower Jurassic specimen
from the Black Ven Marls of Stonebarrow Cliff, Charmouth, Dorset, UK. It comes from the world-famous Jurassic Coast, a coastline internationally recognised for its fossil-rich cliffs, historic fossil discoveries and important record of ancient marine life.The photograph shows the actual fossil you will receive, making this a carefully chosen individual specimen rather than a stock image or representative example. For full sizing and visible condition, please see the listing photo. This fossil includes a Certificate of Authenticity lifetime guarantee generic card.Species and Scientific InterestAsteroceras obtusum is a classic Early Jurassic ammonite species and one of the most recognisable ammonites from the Lower Lias of Dorset. Ammonites were extinct marine cephalopods, related to modern squid, cuttlefish and nautilus, but they lived inside coiled external shells divided into internal chambers. These chambers allowed the animal to regulate buoyancy, while the soft-bodied animal occupied the final living chamber.Asteroceras is known for its robust coiled shell, rounded whorls and strong ammonite form. The species obtusum is associated with a relatively broad, rounded shell profile, giving it a solid and attractive appearance. Many examples show ribbing that follows the curve of the whorl, creating the classic Jurassic ammonite look that is highly desirable to collectors.This species is especially important because it gives its name to the Obtusum Zone, an ammonite biozone within the Sinemurian Stage of the Lower Jurassic. Ammonites evolved rapidly and were widely distributed through ancient seas, making them valuable index fossils for dating and comparing rock layers. Asteroceras obtusum is therefore not only an attractive fossil but also a scientifically meaningful example of Jurassic biostratigraphy.Geology, Age and LocalityThis specimen comes from the Black Ven Marls, part of the Lower Lias sequence exposed around Stonebarrow Cliff and Charmouth. These deposits were laid down during the Early Jurassic, when the area now known as Dorset was covered by a shallow to moderately deep marine environment. Fine muds, silts and calcareous sediments accumulated on the sea floor, preserving ammonites, belemnites, bivalves, marine reptile remains and other fossil sea life.Stonebarrow Cliff, near Charmouth, is one of the most famous fossil localities on the Jurassic Coast. The cliffs and foreshore exposures are well known for Lower Jurassic ammonites and have long attracted collectors, geologists and palaeontologists. Fossils from this area are valued for their connection to one of Britain’s most important natural history landscapes.Preparation and AuthenticityYour specimen was discovered by our own team members, Alister and Alison, and has been cleaned, prepped and treated by Alison. This careful preparation helps present the fossil clearly while preserving its genuine natural character as an authentic geological specimen.This Asteroceras obtusum ammonite is a genuine fossil and is supplied exactly as shown in the listing photograph. The included Certificate of Authenticity lifetime guarantee generic card provides reassurance that this is a real fossil specimen selected for quality, locality and collector appeal.Display, Collecting and Educational ValueThis Asteroceras obtusum ammonite fossil is ideal for fossil collectors, geology enthusiasts, educational collections, natural history displays and anyone interested in British Jurassic fossils. Its Lower Lias age, Black Ven Marls origin and classic Charmouth locality make it a desirable specimen from one of the UK’s best-known fossil areas.As a genuine ammonite from Stonebarrow Cliff, Charmouth, Dorset, this fossil offers a direct connection to the ancient Jurassic seas that once covered southern England. It would make an excellent display fossil, teaching specimen, collector’s item or natural history gift for anyone interested in ammonites, cephalopods, the Jurassic Coast, Dorset fossils and Early Jurassic marine life.
from the Black Ven Marls of Stonebarrow Cliff, Charmouth, Dorset, UK. It comes from the world-famous Jurassic Coast, a coastline internationally recognised for its fossil-rich cliffs, historic fossil discoveries and important record of ancient marine life.The photograph shows the actual fossil you will receive, making this a carefully chosen individual specimen rather than a stock image or representative example. For full sizing and visible condition, please see the listing photo. This fossil includes a Certificate of Authenticity lifetime guarantee generic card.Species and Scientific InterestAsteroceras obtusum is a classic Early Jurassic ammonite species and one of the most recognisable ammonites from the Lower Lias of Dorset. Ammonites were extinct marine cephalopods, related to modern squid, cuttlefish and nautilus, but they lived inside coiled external shells divided into internal chambers. These chambers allowed the animal to regulate buoyancy, while the soft-bodied animal occupied the final living chamber.Asteroceras is known for its robust coiled shell, rounded whorls and strong ammonite form. The species obtusum is associated with a relatively broad, rounded shell profile, giving it a solid and attractive appearance. Many examples show ribbing that follows the curve of the whorl, creating the classic Jurassic ammonite look that is highly desirable to collectors.This species is especially important because it gives its name to the Obtusum Zone, an ammonite biozone within the Sinemurian Stage of the Lower Jurassic. Ammonites evolved rapidly and were widely distributed through ancient seas, making them valuable index fossils for dating and comparing rock layers. Asteroceras obtusum is therefore not only an attractive fossil but also a scientifically meaningful example of Jurassic biostratigraphy.Geology, Age and LocalityThis specimen comes from the Black Ven Marls, part of the Lower Lias sequence exposed around Stonebarrow Cliff and Charmouth. These deposits were laid down during the Early Jurassic, when the area now known as Dorset was covered by a shallow to moderately deep marine environment. Fine muds, silts and calcareous sediments accumulated on the sea floor, preserving ammonites, belemnites, bivalves, marine reptile remains and other fossil sea life.Stonebarrow Cliff, near Charmouth, is one of the most famous fossil localities on the Jurassic Coast. The cliffs and foreshore exposures are well known for Lower Jurassic ammonites and have long attracted collectors, geologists and palaeontologists. Fossils from this area are valued for their connection to one of Britain’s most important natural history landscapes.Preparation and AuthenticityYour specimen was discovered by our own team members, Alister and Alison, and has been cleaned, prepped and treated by Alison. This careful preparation helps present the fossil clearly while preserving its genuine natural character as an authentic geological specimen.This Asteroceras obtusum ammonite is a genuine fossil and is supplied exactly as shown in the listing photograph. The included Certificate of Authenticity lifetime guarantee generic card provides reassurance that this is a real fossil specimen selected for quality, locality and collector appeal.Display, Collecting and Educational ValueThis Asteroceras obtusum ammonite fossil is ideal for fossil collectors, geology enthusiasts, educational collections, natural history displays and anyone interested in British Jurassic fossils. Its Lower Lias age, Black Ven Marls origin and classic Charmouth locality make it a desirable specimen from one of the UK’s best-known fossil areas.As a genuine ammonite from Stonebarrow Cliff, Charmouth, Dorset, this fossil offers a direct connection to the ancient Jurassic seas that once covered southern England. It would make an excellent display fossil, teaching specimen, collector’s item or natural history gift for anyone interested in ammonites, cephalopods, the Jurassic Coast, Dorset fossils and Early Jurassic marine life.
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