How was the Cretaceous period different from the Jurassic Period? ... There were dinosaurs in the Jurassic period, which went extinct in the Cretaceous period. d. Conifers and ferns were present in the Jurassic period, but not in the Cretaceous period.

What is the Cretaceous period known for?

During this period, oceans formed as land shifted and broke out of one big supercontinent into smaller ones. Continents were on the move in the Cretaceous, busy remodeling the shape and tone of life on Earth.

What is the difference between the dinosaur periods?

Dinosaur communities were separated by both time and geography. The 'Age of Dinosaurs' (the Mesozoic Era) included three consecutive geologic time periods (the Triassic, Jurassic, and Cretaceous Periods). Different dinosaur species lived during each of these three periods.

What developments occurred from the Jurassic period to the Cretaceous period?

What developments occurred from the Jurassic period to the Cretaceous period? Dinosaurs were common in the Jurassic period, but during the Cretaceous period they went extinct. Pangaea had fully split by the Cretaceous period and angiosperms had developed.

What are 3 fun facts about the Cretaceous period?

14 Cretaceous Period Facts

• The Cretaceous Period is the third of the three geologic periods of the Mesozoic Era.
• The Cretaceous Period was the longest period of the Mesozoic Era.
• The Cretaceous Period lasted roughly 79 million years.
• The Cretaceous Period occurred between 145 and 66 million years ago.

The Age of Reptiles in Three Acts

24 related questions found

What makes the Cretaceous Period unique?

The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land.

What makes the Paleogene period unique?

Lasting 43 million years, the Paleogene is most notable as being the time in which mammals evolved from relatively small, simple forms into a large group of diverse animals in the wake of the Cretaceous–Paleogene extinction event that ended the preceding Cretaceous Period.

How was the Cretaceous period different from the Jurassic period quizlet?

The Jurassic period had angiosperms, while the Cretaceous did not. ... There were dinosaurs in the Jurassic period, which went extinct in the Cretaceous period. d. Conifers and ferns were present in the Jurassic period, but not in the Cretaceous period.

Why did the Cretaceous period End?

As originally proposed in 1980 by a team of scientists led by Luis Alvarez and his son Walter, it is now generally thought that the K–Pg extinction was caused by the impact of a massive comet or asteroid 10 to 15 km (6 to 9 mi) wide, 66 million years ago, which devastated the global environment, mainly through a ...

What are the different Jurassic periods?

Geology. The Jurassic Period is divided into three epochs: Early, Middle, and Late. Similarly, in stratigraphy, the Jurassic is divided into the Lower Jurassic, Middle Jurassic, and Upper Jurassic series.

What does Jurassic and Cretaceous mean?

The Jurassic period, from about 200 million to 145 million years ago, ushered in birds and mammals. And the Cretaceous period, from 145 million to 66 million years ago is known for its iconic dinosaurs, such as Triceratops, and pterosaurs such as Pteranodon. ... Flowering plants emerged during the late Cretaceous period.

Which came first the Jurassic or Cretaceous period?

The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded by the Paleogene Period (the first of the two periods into which the Tertiary Period was divided). The Cretaceous is the longest period of the Phanerozoic Eon.

What events happened during the Cretaceous period?

During the Cretaceous, accelerated plate collision caused mountains to build along the western margin of North America. As these mountains were rising, the Gulf of Mexico basin subsided, and seawater began to spread northward into the expanding western interior. Marine water also began to flood from the Arctic region.

Why was the Cretaceous period so warm?

Earth was warmer during the Cretaceous era because the atmosphere contained 3-6 times more carbon dioxide than the current era. Carbon dioxide formed from the decay of large amounts of dead plants.

What does Cretaceous mean?

: of, relating to, or being the last period of the Mesozoic era characterized by continued dominance of reptiles, emergent dominance of angiosperms, diversification of mammals, and the extinction of many types of organisms at the close of the period also : of, relating to, or being the corresponding system of rocks — ...

Was the Cretaceous period a killing machine?

Tyrannosaurs were the killing machines of the late Cretaceous period. These huge, powerful carnivores were all legs, trunk, and teeth, and they preyed relentlessly on smaller, herbivorous Dinosaurs (not to mention other theropods).

Was there grass in the Cretaceous period?

True grasses (Poaceae), as mentioned before, were already there in the Late Cretaceous. However, they might not have yet been similarly adapted to dry conditions and frequent grazing as they are now.

How was the Carboniferous different from the Devonian?

There were vertebrates in the Carboniferous period, but not in the Devonian period. ... There were an increased number of land-based organisms in the Carboniferous period. d. There were vertebrates with four legs in the Devonian period, but not in the Carboniferous.

Did humans evolved in the Eocene period?

Humans evolved in the Eocene period. ... Humans have impacted the rainforests through mining, agriculture, and construction.

How does the Alaska blackfish survive in waters with temperatures of 5ºf?

The Alaska blackfish survives in water with temperatures of 5ºF by producing chemicals that lower the freezing temperature of cellular fluids. This keeps the fluids of the fish from freezing, allowing it to survive.

What is Paleogene period known for?

The Paleogene is most notable for being the time during which mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of the Cretaceous–Paleogene extinction event that ended the preceding Cretaceous Period.

What happened in the Paleocene Epoch?

The Paleocene Epoch began and ended with two great events: the Cretaceous–Tertiary extinction event and the Paleocene–Eocene Thermal Maximum. The continents moved closer to their current positions, dinosaurs were wiped out, and mammals and birds greatly diversified. What a great time in Earth's history!