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Third and last period of the Mesozoic Era
The Cretaceous (IPA: /krɪˈteɪʃəs/ krih-TAY-shəss) is a geological period that lasted from about 143.1 to 66 Ma (million years ago). It is the third and
Cretaceous
Mass extinction event about 66 million years ago
The Cretaceous–Paleogene (K–Pg) extinction event, formerly known as the Cretaceous-Tertiary (K–T) extinction event, was a major mass extinction of three-quarters
Cretaceous–Paleogene extinction event
Cretaceous–Paleogene_extinction_event
Subdivision of Cretaceous Period
The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata
Late_Cretaceous
First epoch of the Cretaceous Period
The Early Cretaceous (geochronological name) or the Lower Cretaceous (chronostratigraphic name) is the earlier or lower of the two major divisions of the
Early_Cretaceous
American animated television series
Jurassic World Camp Cretaceous is an American science fiction action-adventure animated television series developed by Zack Stentz for Netflix and is the
Jurassic World Camp Cretaceous
Jurassic_World_Camp_Cretaceous
Prehistoric inland sea that split the continent of North America
The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large
Western_Interior_Seaway
Geological boundary between time periods
The Cretaceous–Paleogene (K–Pg) boundary, formerly known as the Cretaceous–Tertiary (K–T) boundary, is a geological signature, usually a thin band of rock
Cretaceous–Paleogene_boundary
Jurassic World Camp Cretaceous is an American animated science fiction action-adventure television series developed by Zack Stentz. The series debuted
List of Jurassic World Camp Cretaceous episodes
List_of_Jurassic_World_Camp_Cretaceous_episodes
Formation (Lower Cretaceous) of Utah, USA, and spatiotemporal implications for the Cretaceous sauropods in North America". Cretaceous Research 106395.
2026 in archosaur paleontology
2026_in_archosaur_paleontology
Clade of reptiles
event 201.3 mya and their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, having
Dinosaur
Time of intense flowering plant diversification
The Cretaceous Terrestrial Revolution (abbreviated KTR), also known as the Angiosperm Terrestrial Revolution (ATR) by authors who consider it to have lasted
Cretaceous Terrestrial Revolution
Cretaceous_Terrestrial_Revolution
Second era of the Phanerozoic Eon
about 252 to 66 million years ago, comprising the Triassic, Jurassic and Cretaceous Periods. It is characterized by the dominance of archosaurian reptiles
Mesozoic
Period of climatic warming that reached its peak approximately 90 million years ago
The Cretaceous Thermal Maximum (CTM), also known as Cretaceous Thermal Optimum, was a period of climatic warming that reached its peak approximately 90
Cretaceous_Thermal_Maximum
Class of lobe-finned fishes
410 million years ago), they were thought to have become extinct in the Late Cretaceous, around 66 million years ago. The first living species, Latimeria chalumnae
Coelacanth
Genus of Late Cretaceous theropod
formations which have been dated to the late Maastrichtian age of the late Cretaceous period, 69 to 66 million years ago, with isolated specimens possibly indicating
Tyrannosaurus
Evolutionary diversification event during the Cretaceous period
The Cretaceous crab revolution was a major diversification event of brachyuran crustaceans (also known as true crabs) that took place during the Cretaceous
Cretaceous_crab_revolution
First period of the Cenozoic Era
geologic period and system that spans 43 million years from the end of the Cretaceous Period 66 Ma (million years ago) to the beginning of the Neogene Period
Paleogene
Academic journal
Cretaceous Research is a bimonthly peer-reviewed scientific journal published by Elsevier. The journal focuses on topics dealing with the Cretaceous period
Cretaceous_Research
Prehistoric impact crater in Mexico
tektites in surrounding areas. The date of the impact coincides with the Cretaceous–Paleogene boundary (commonly known as the K–Pg or K–T boundary). It is
Chicxulub_crater
Second period of the Mesozoic Era
Triassic Period 201.4 Ma (million years ago) to the beginning of the Cretaceous Period, 143.1 Ma. The Jurassic constitutes the second and middle period
Jurassic
Cretaceous Mongolia is one of the best preserved of all Mesozoic ecosystems. The shifting sand of what was, even then, the Gobi Desert have ensured that
Cretaceous_Mongolia
Cretaceous polar forests were temperate forests that grew at polar latitudes towards the end of the Mesozoic Era, known as the Cretaceous Period (145–66 Ma)
Polar forests of the Cretaceous
Polar_forests_of_the_Cretaceous
Prehistoric climate changes
The climate across the Cretaceous–Paleogene boundary (K–Pg or formerly the K–T boundary) is very important to geologic time as it marks a catastrophic
Climate across Cretaceous–Paleogene boundary
Climate_across_Cretaceous–Paleogene_boundary
Extinct marine lizards of the Late Cretaceous
aquatic reptiles within the family Mosasauridae that lived during the Late Cretaceous. Their first fossil remains were discovered in a limestone quarry at Maastricht
Mosasaur
1998 film by Brett Leonard
T-Rex: Back to the Cretaceous is a 1998 American educational adventure film shot for the IMAX 3D format. The film is directed by Brett Leonard. Executive
T-Rex:_Back_to_the_Cretaceous
an as yet undescribed genus or species of tyrannosaurid from the Late Cretaceous period of North America. The fossils of this animal originate from the
List of informally named dinosaurs
List_of_informally_named_dinosaurs
years ago, and their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record demonstrates that birds are modern feathered
List_of_dinosaur_genera
Genus of spinosaurid dinosaur
lived in what is now North Africa during the Cenomanian age of the Late Cretaceous period, about 100 to 94 million years ago. The genus was known first from
Spinosaurus
Ray-finned fish
family Acipenseridae. The earliest sturgeon fossils date to the Late Cretaceous, and are descended from other, earlier acipenseriform fish, which date
Sturgeon
Period of time of increased resin production
The Cretaceous Resinous Interval (CREI) was a period of time when there was a high rate of resin production, creating large deposits of amber. It occurred
Cretaceous_resinous_interval
Teratornis were shown to be feasting on Cretaceous and Maelstrom's corpses. Cretaceous is a Metriorhynchus. Cretaceous is shown in the beginning frozen in
List_of_Ice_Age_characters
Fossil flora and fauna of North American site
Review of the Late Cretaceous nodosauroid Dinosauria: Denversaurus schlessmani, a new armor-plated dinosaur from the Latest Cretaceous of South Dakota,
Paleobiota of the Hell Creek Formation
Paleobiota_of_the_Hell_Creek_Formation
Extinct order of flying reptiles
during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 million to 66 million years ago). Pterosaurs are the earliest vertebrates
Pterosaur
Genus of Late Cretaceous dinosaur
ceratopsian dinosaur that lived during the late Maastrichtian age of the Late Cretaceous period, about 69 to 66 million years ago on the island continent of Laramidia
Triceratops
Infraclass of mammals in the clade Eutheria
may have originated in the Late Cretaceous around 90 mya, but the earliest undisputed fossils are dated to the Cretaceous–Paleogene boundary (K-Pg boundary)
Placentalia
Extinct group of theropod dinosaurs
of carnivorous theropod dinosaurs that lived during the Jurassic and Cretaceous periods. While Carnosauria was historically considered largely synonymous
Carnosauria
Genus of Late Cretaceous dinosaur
genus of small dromaeosaurid dinosaurs that lived in Asia during the Late Cretaceous epoch, about 75 million to 71 million years ago (Mya). Two species are
Velociraptor
Cretaceous sea in Australia
an inland sea across the Australian continent that formed in the Early Cretaceous. The sea extended from the Eromanga Basin northward to the Carpentarian
Eromanga_Sea
The Cretaceous steppes with Caragana (Russian: Меловые степи с караганой) is a natural monument (protected areas of Ulyanovsk Oblast). It is managed by
Cretaceous steppes with Caragana
Cretaceous_steppes_with_Caragana
First epoch of the Paleogene Period
time interval directly after the K–Pg extinction event, which ended the Cretaceous Period and the Mesozoic Era, and initiated the Cenozoic Era and the Paleogene
Paleocene
American animated television series
Jurassic Park franchise. It serves as a direct sequel to Jurassic World Camp Cretaceous (2020–2022), and takes place both before and during the events of Jurassic
Jurassic_World:_Chaos_Theory
Isolated land mass which became the Indian subcontinent
which became the Indian subcontinent. Across the latter stages of the Cretaceous and most of the Paleocene, following the breakup of Gondwana, the Indian
Insular_India
Low-lying basin filled with Cretaceous to recent sediments
River at Cairo, Illinois. The current sedimentary area was formed in the Cretaceous and early Cenozoic by the filling with sediment of a pre-existing basin
Mississippi_embayment
Geologic formation in North America
The Pierre Shale is a geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley
Pierre_Shale
osteoderms, the majority of which happened in the Late Jurassic and Early Cretaceous. Ait Haddou et al. (2026) report the discovery of lacertoid-type tracks
2026_in_reptile_paleontology
Extinct subclass of cephalopod molluscs
million years ago, with the last species vanishing during or soon after the Cretaceous–Paleogene extinction event approximately 66 million years ago. They are
Ammonoidea
Genus of pachycephalosaurid dinosaurs
species, P. spinifer. It lived during the Maastrichtian age of the Late Cretaceous period in what is now western North America. Remains have been excavated
Pachycephalosaurus
Clade of mammals in the subclass Theria
Placentalia. The earliest unambiguous eutherians are known from the Early Cretaceous Yixian Formation of China, dating around 120 million years ago. Two tribosphenic
Eutheria
Large igneous province in India
spanning the Cretaceous–Paleogene boundary. While some authors initially suggested the eruptions were a major cause of the Cretaceous–Paleogene mass
Deccan_Traps
Geological feature
margin of the platform during the early Cretaceous, and around the southern end of the platform in the late Cretaceous, creating silled basins where thick
Florida_Platform
Genus of megaraptoran dinosaurs
Maip is a genus of large megaraptorid theropod dinosaur from the Late Cretaceous (Maastrichtian) Chorrillo Formation of Santa Cruz, Argentina. The genus
Maip
Extinct genus of dinosaurs
by Richard Lydekker in 1877. It is known from the Maastrichtian (Upper Cretaceous) Lameta and Kallakurichi Formations of India. Titanosaurus, literally
Titanosaurus
Extinct genus of marine lizard from the Late Cretaceous
million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous. The genus was one of the first Mesozoic marine reptiles known to science—the
Mosasaurus
5th episode of the 2nd season of Jurassic World Camp Cretaceous
season of the American streaming television series Jurassic World Camp Cretaceous, and the thirteenth episode overall. Written by Lindsay Kerns and directed
Brave (Jurassic World Camp Cretaceous)
Brave_(Jurassic_World_Camp_Cretaceous)
Genus of Early Cretaceous sauropod
The fossils were found in rocks dating from near the end of the Early Cretaceous (Aptian–early Albian), from about 113 to 110 million years ago, a time
Sauroposeidon
Reversal of direction of Earth's magnetic field
superchron but is now attributed to other causes. The Cretaceous Normal Superchron (also called the Cretaceous Superchron or C34) lasted for 37 million years
Geomagnetic_reversal
Third and last age of the late Jurassic
preceded by the Kimmeridgian and followed by the Berriasian (part of the Cretaceous). The Tithonian was introduced in scientific literature by German stratigrapher
Tithonian
Subclass of plants containing three genera of gymnosperms
and the group reached its greatest known diversity during the Early Cretaceous. Gnetophytes are distinguished from other living gymnosperms by the presence
Gnetidae
Extinct genus of shark
Cretoxyrhina (/krɪˌtɒksiˈrhaɪnə/; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years
Cretoxyrhina
American paleontologist
from the Lower Cretaceous of Utah". Hunteria. 2 (10). Kirkland, J.I. and Carpenter, K. (1994). "North America's first pre-Cretaceous ankylosaur (Dinosauria)
James_I._Kirkland
Island continent that existed until the end of the Late Cretaceous period
Laramidia was an island continent that existed during the Late Cretaceous period (99.6–66 Ma), when the Western Interior Seaway split the continent of
Laramidia
Fourth and current eon of the geological timescale
years ago, and is divided into two epochs: Early Cretaceous, and Late Cretaceous. The Early Cretaceous Epoch spans from 145 million to 100 million years
Phanerozoic
Genus of dinosaur from the Early Cretaceous
feathered carnivorous theropods) dinosaur that lived during the Early Cretaceous period from around 139 to 135 million years ago in what is now the United
Utahraptor
Carcharodontosaurid dinosaur genus from the Cretaceous
carcharodontosaurid dinosaur that lived in Argentina during the Albian age of the Early Cretaceous. It is known from a bonebed of between seven and nine specimens, excavated
Mapusaurus
Stratiotosuchus maxhechti were ectothermic. A study on the osteoderm histology of Cretaceous notosuchians from Brazil is published by Sena et al. (2022), who report
2022 in archosaur paleontology
2022_in_archosaur_paleontology
Order of sharks
of lamniformes are from the Early Cretaceous. Lamniformes underwent a major adaptive radiation during the Cretaceous and became prominent elements of oceanic
Lamniformes
Geological formation in the United States
Hell Creek Formation is an intensively studied division of mostly Upper Cretaceous and some lower Paleocene rocks in North America, named for exposures studied
Hell_Creek_Formation
(Pterosauria, Azhdarchoidea) from the mid-Cretaceous Kem Kem beds of Takmout, southern Morocco". Cretaceous Research. 112 104424. Bibcode:2020CrRes.11204424M
List_of_pterosaur_genera
Order of insects
are a relict group, having reached their apex of diversity during the Cretaceous before undergoing substantial decline. An adult snakefly resembles a lacewing
Snakefly
Order of egg-laying mammals
Australosphenida, a clade that contains extinct mammals from the Jurassic and Cretaceous of Madagascar, South America, and Australia, but this categorization is
Monotreme
Organism resembling a form long shown in the fossil records
disappeared from the fossil record some 80 million years ago (in the upper Cretaceous period) and, to the extent that they exhibit low rates of morphological
Living_fossil
Earliest age of the Late Cretaceous Epoch
timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it
Cenomanian
Order of insects
†Babinskaiidae (Cretaceous) Family Myrmeleontidae: antlions (includes Palaeoleontidae) (Cretaceous–Present) Family Nemopteridae: spoonwings etc. (Cretaceous–Present)
Neuroptera
Genus of theropod dinosaur
could grow up to 3.4 meters (11 ft) long, lived during the Early and Late Cretaceous Period, about 115–98 million years ago (from the mid-Aptian to Cenomanian
Deinonychus
Extinct genus of dinosaurs
lived in the present-day East Coast of the United States during the Late Cretaceous period. The type, and only, species, D. aquilunguis was described by Edward
Dryptosaurus
Extinct clade of dinosaurs
still thriving at the time of the extinction event at the end of the Cretaceous. This group includes some of the largest land animals known to have ever
Titanosauria
to date. Peixoto et al. (2026) interpret trace fossils from the Lower Cretaceous Botucatu Formation (Brazil) assigned to the ichnotaxon Cochlichnus anguineus
2026_in_paleoentomology
Neoproterozoic to Cretaceous landmass
Ocean; Lhasa collided with Asia during the Early Cretaceous, and Burma and Woyla during the Late Cretaceous. Gondwana's long, northern margin remained a mostly
Gondwana
is controversial as flowering plants appear in great diversity in the Cretaceous, with scanty and debatable records before that, creating a puzzle for
Fossil history of flowering plants
Fossil_history_of_flowering_plants
Family of lizards
crocodile lizard. The oldest members of the family are known from the Late Cretaceous of Mongolia. The Varanidae were defined (using morphological characteristics)
Varanidae
Extinct order of bivalve molluscs
the Cretaceous that they were major reef-building organisms in the Tethys Ocean, until their complete extinction at the close of the Cretaceous. The
Rudists
Third and current era of the Phanerozoic Eon
preceded by the Mesozoic and Paleozoic. The Cenozoic started with the Cretaceous–Paleogene extinction event, when many species, including the non-avian
Cenozoic
Geologic formation in Antarctica
of the Antarctic Peninsula. The strata date from the end of the Late Cretaceous (upper-lower Maastrichtian stage) to the Danian stage of the lower Paleocene
López_de_Bertodano_Formation
Superfamily of wasps
species, mid Cretaceous, Burmese amber), Myanmarinidae (4 species, mid Cretaceous, Burmese amber) and Ohlhoffiidae (4 species, Early-mid Cretaceous). Jouault
Stephanoidea
Geological formation in Mongolia
geological formation in the Gobi Desert of Mongolia, dating to the Late Cretaceous. The formation consists of river channel sediments and contains fossils
Nemegt_Formation
Extinct genus of giant sauropod dinosaur
Argentina") is a genus of giant sauropod dinosaur that lived during the Early Cretaceous period in what is now Argentina. Although it is only known from fragmentary
Argentinosaurus
regions of Australia during the Early Cretaceous. Bandeira et al. (2024) revise dinosaur remains from the Lower Cretaceous Massacará and Ilhas groups (Recôncavo
2024 in archosaur paleontology
2024_in_archosaur_paleontology
Soft carbonate rock
flint). Chalk is so common in Cretaceous marine beds that the Cretaceous Period was named for these deposits. The name Cretaceous was derived from Latin creta
Chalk
Proposed UNESCO World Heritage site
sites of fossilized dinosaur eggs and footprints of dinosaurs from the Cretaceous period of the Mesozoic era in the world are located in various sites along
Sites of fossilized dinosaurs across the southern South Korean coast
Sites_of_fossilized_dinosaurs_across_the_southern_South_Korean_coast
fauna of the Lower Cretaceous Kirkwood Formation of South Africa: Implications for the Jurassic–Cretaceous transition". Cretaceous Research. 59: 228–248
List_of_sauropod_species
Extinct superfamily of dinosaurs
Laurasian supercontinent beginning in the Jurassic Period. By the end of the Cretaceous Period, tyrannosauroids were the dominant large predators in the Northern
Tyrannosauroidea
Therizinosaurid genus from the Late Cretaceous period
genus of very large therizinosaurid dinosaurs that lived during the Late Cretaceous period in what is now Asia. It contains a single species, Therizinosaurus
Therizinosaurus
Ankylosaurid dinosaur genus from the Late Cretaceous Period
have been found in geological formations dating to the very end of the Cretaceous Period, about 70-66 million years ago, in western North America, making
Ankylosaurus
Extinct genus of pholidosaurid crocodylomorph
meaning "Sobek", is a genus of crocodyliform that lived during the Early Cretaceous (Hauterivian to Albian ages, 133 to 101 million years ago) in North Africa
Sarcosuchus
Abelisaurid dinosaur genus from Late Cretaceous India
is a genus of carnivorous abelisaurid theropod dinosaur from the Late Cretaceous of India, containing one species: Rajasaurus narmadensis. The bones were
Rajasaurus
Extinct order of mammals
in the Middle Jurassic, and reached a peak diversity during the Late Cretaceous and Paleocene. They declined from the mid-Paleocene onwards, finally going
Multituberculata
Sedimentary basin in Australia
Southern Rift System. The basin dates from the late Jurassic to late Cretaceous periods and formed by multi-stage rifting during the breakup of Gondwana
Otway_Basin
Dinosaur footprint
Cretaceous Jiaguan Formation and C. protohadrosaurichnos from Upper Cretaceous Woodbine Formation. Specimens are also known from the Lower Cretaceous
Caririchnium
Family of large azhdarchoid pterosaurs
Persian mythology) is a family of pterosaurs known mostly from the Late Cretaceous. Azhdarchids include the largest flying animals discovered, but smaller
Azhdarchidae
Research timeline
19th century, a significant amount of research has been conducted on the Cretaceous–Paleogene extinction event, the mass extinction that ended the dinosaur-dominated
Timeline of Cretaceous–Paleogene extinction event research
Timeline_of_Cretaceous–Paleogene_extinction_event_research
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