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  2. Cretaceous - Wikipedia

    en.wikipedia.org/wiki/Cretaceous

    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. The world was largely ice-free, although there is some evidence ...

  3. Polar forests of the Cretaceous - Wikipedia

    en.wikipedia.org/.../Polar_forests_of_the_Cretaceous

    Cretaceous polar forests were temperate forests that grew at polar latitudes during the final period of the Mesozoic Era, known as the Cretaceous Period 145–66 Ma. [1] During this period, global average temperature was about 10 °C (18 °F) higher and carbon dioxide (CO 2 ) levels were approximately 1000 parts per million (ppm), 2.5 times the ...

  4. Late Cretaceous - Wikipedia

    en.wikipedia.org/wiki/Late_Cretaceous

    The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after creta, the Latin word for the white limestone known as chalk.

  5. Hell Creek Formation - Wikipedia

    en.wikipedia.org/wiki/Hell_Creek_Formation

    It is a series of fresh and brackish-water clays, mudstones, and sandstones deposited during the Maastrichtian and Danian (respectively, the end of the Cretaceous period and the beginning of the Paleogene) by fluvial activity in fluctuating channels and deltas and very occasional peaty swamp deposits along the low-lying eastern continental ...

  6. Tempskya - Wikipedia

    en.wikipedia.org/wiki/Tempskya

    Tempskya is an extinct genus of tree fern that lived during the Cretaceous period.Fossils have been found across both the Northern and Southern hemispheres. [2] The growth habit of Tempskya was unlike that of any living fern or any other living plant, consisting of multiple conjoined dichotomous branching stems enmeshed within roots that formed a "false trunk".

  7. Category:Cretaceous plants - Wikipedia

    en.wikipedia.org/wiki/Category:Cretaceous_plants

    Prehistoric plants of the Cretaceous Period, during the Late/Upper Mesozoic Era Subcategories. This category has the following 3 subcategories, out of 3 total. ...

  8. Early Cretaceous - Wikipedia

    en.wikipedia.org/wiki/Early_Cretaceous

    The fossil location indicates early mammals began to diversify from Asia during the Early Cretaceous. Sinodelphys was more closely related to metatherians (marsupials) than eutherians (placentals) and had feet adapted for climbing trees. [13] Steropodon is the oldest monotreme (egg-lying mammal) discovered. It lived in Gondwana (now Australia ...

  9. Paleobiota of the Hell Creek Formation - Wikipedia

    en.wikipedia.org/wiki/Paleobiota_of_the_Hell...

    The evidence of the forested environment is overwhelmingly supported by petrified wood, rooted gley paleosols, [123] and ubiquitous tree leaves. The presence of the simple and lobed leaves, combined with an extremely high dicot diversity, extinct cycadeoid Nilssoniocladus , Ginkgo , many types of monocots , and several types of conifers is ...