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The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name), is the earlier of the two major divisions of the Cretaceous
Cretaceous

The Cretaceous , usually abbreviated K for its German translation Kreide, is a geologic period from circa to million years ago . In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period....
 Period. It began about 146 million years ago.

During this time many new types of dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s appeared or came into prominence, including psittacosaurs
Psittacosaurus

Psittacosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago....
, spinosaurs
Spinosauridae

Spinosauridae is a family of unusual theropod dinosaurs. Members of this group were large, bipedal predators with elongated, crocodile-like skulls, sporting conical teeth with no or only very tiny serrations....
 and coelurosaurs, while other survivors from the Late Jurassic
Late Jurassic

The Late Jurassic Epoch of the Jurassic Period is the unit of geologic time scale from 161.2 ? 4.0 to 145.5 ? 4.0 million years ago, which is preserved in Upper Jurassic stratum....
 continued.

In the seas, the ichthyosaur
Ichthyosaur

Ichthyosaurs were giant marine reptiles that resembled fish and dolphins. Ichthyosaurs thrived during much of the Mesozoic era; based on fossil evidence, they first appeared approximately 245 million years ago and disappeared about 90 million years ago, about 25 million years before the dinosaurs became extinct....
s declined and eventually died out at the start of the Late Cretaceous
Late Cretaceous

Late Cretaceous refers to the second half of the Cretaceous Period , named after the famous white chalk cliffs of southern England, which date from this time....
.






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The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name), is the earlier of the two major divisions of the Cretaceous
Cretaceous

The Cretaceous , usually abbreviated K for its German translation Kreide, is a geologic period from circa to million years ago . In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period....
 Period. It began about 146 million years ago.

During this time many new types of dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s appeared or came into prominence, including psittacosaurs
Psittacosaurus

Psittacosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago....
, spinosaurs
Spinosauridae

Spinosauridae is a family of unusual theropod dinosaurs. Members of this group were large, bipedal predators with elongated, crocodile-like skulls, sporting conical teeth with no or only very tiny serrations....
 and coelurosaurs, while other survivors from the Late Jurassic
Late Jurassic

The Late Jurassic Epoch of the Jurassic Period is the unit of geologic time scale from 161.2 ? 4.0 to 145.5 ? 4.0 million years ago, which is preserved in Upper Jurassic stratum....
 continued.

In the seas, the ichthyosaur
Ichthyosaur

Ichthyosaurs were giant marine reptiles that resembled fish and dolphins. Ichthyosaurs thrived during much of the Mesozoic era; based on fossil evidence, they first appeared approximately 245 million years ago and disappeared about 90 million years ago, about 25 million years before the dinosaurs became extinct....
s declined and eventually died out at the start of the Late Cretaceous
Late Cretaceous

Late Cretaceous refers to the second half of the Cretaceous Period , named after the famous white chalk cliffs of southern England, which date from this time....
. Neognathous
Neognathia

The Neognathia birds Aves whose Palate mobility has been increased via the following modifications :* Loss of the Basipterygoid articulation with the cranium....
 bird
Bird

Birds are wing, Bipedalismal, endothermic , vertebrate animals that lay egg . There are around 10,000 living species, making them the most numerous tetrapod vertebrates....
s and angiosperms, appear for the first time.