RMT9642F–Carboniferous landscape. The fifth period of the Paleozoic Era. The Carboniferous Period spanned from about 355 million years to about 295 million years ago. The rocks that formed during this time interval are known as the Carboniferous System; they include a wide variety of sedimentary, igneous, and metamorphic rocks. Sedimentary rocks in the lower portion of the Carboniferous are typically carbonates, such as limestones and dolostones, and locally some evaporites.
RMG15NF9–The Mesozoic Era is an interval of geological time from about 252 to 66 million years ago. It is often referred to as the Age of Reptiles because reptiles, namely non-avian dinosaurs, were the dominant terrestrial and marine vertebrates of the time. The M
RMPG15M4–. Fossil plants : for students of botany and geology . Paleobotany. 306 FILICALES [CH. aceae and thalloid Liverworts^ is worthy of mention as one of the many possible pitfalls to be avoided by the palaeobotanical student. The long linear fronds of such genera as Vittaria and Monogramme might well be identified in a fossil state as the leaves of a grass-like Monocotyledon, or compared with the. Fig. 236 h. Pteris aquilina. Leaf from the same plant grown out of doors, (i nat. size.) After Boodle. foliage of Isoetes or Pilulana. The resemblance of some fern leaves with reticulate venation to thos
RMRDFE7W–. Fossil plants : for students of botany and geology . Paleobotany. 12 CYCADALES [CH. â palaeobotanical student of the occurrence of flowering plants with stems closely simulating those of some Cycads. Prof. Bower^ in describing Rhynchofetalum montanum, an Abyssinian Lobelia- ceous plant, drew attention to the similarity in surface-features and to some extent in anatomical structure to cycadean stems. The resemblances are further emphasised in a more recently pubhshed account of the same species under a different name, Lobelia Khyncho-petalum^. Fig. 383. Cycas siamensis. (From the Encyclopaedi
RMHRJ9YN–Prehistoric, Pleistocene Landscape
RMPG1524–. Fossil plants : for students of botany and geology . Paleobotany. 12 CYCADALES [CH. â palaeobotanical student of the occurrence of flowering plants with stems closely simulating those of some Cycads. Prof. Bower^ in describing Rhynchofetalum montanum, an Abyssinian Lobelia- ceous plant, drew attention to the similarity in surface-features and to some extent in anatomical structure to cycadean stems. The resemblances are further emphasised in a more recently pubhshed account of the same species under a different name, Lobelia Khyncho-petalum^. Fig. 383. Cycas siamensis. (From the Encyclopaedi
RM2BDY8MH–Prehistoric Men Battle Cave Bear
RMRDBBMK–. Fossil plants : for students of botany and geology . Paleobotany. 306 FILICALES [CH. aceae and thalloid Liverworts^ is worthy of mention as one of the many possible pitfalls to be avoided by the palaeobotanical student. The long linear fronds of such genera as Vittaria and Monogramme might well be identified in a fossil state as the leaves of a grass-like Monocotyledon, or compared with the. Fig. 236 h. Pteris aquilina. Leaf from the same plant grown out of doors, (i nat. size.) After Boodle. foliage of Isoetes or Pilulana. The resemblance of some fern leaves with reticulate venation to thos
RM2BE10BR–Prehistoric men using wooden clubs and stone axe to fend off an attacks by a large cave bear. The cave bear (Ursus spelaeus) was a species of bear that lived in Europe during the Pleistocene and became extinct at the beginning of the Last Glacial Maximum, about 27,500 years ago. Mammoths can be seen in the background. A mammoth is any species of the extinct genus Mammuthus, proboscideans commonly equipped with long, curved tusks and, in northern species, a covering of long hair. They lived from the Pliocene epoch (from around 5 million years ago) into the Holocene at about 4,500 years ago in A
RMRJYMYX–. Athlon : essays on palaeontology in honour of Loris Shano Russell. Paleontology. 84 CENOZOIC HERPETOFAUNAS (Boidae) represent the snakes. Snakes outnumber the lizards in the Upper Miocene herpetofauna, and overwhelmingly outnumber the lizards in the Recent herpetofauna of Saskatchewan (see Checklists). Palaeoecology The Cypress Hills Formation lies in the ecotonal zone between the Temperate Unit of the Arcto-Tertiary flora to the North and the Neotropical-Tertiary flora to the south, based on palaeobotanical evidence (see Chaney, 1947; Axelrod, 1958; and map in Kendeigh, 1961, p. 283). The c
RM2BE0HK4–Prehistoric men using wooden clubs and stone axe to fend off an attacks by a large cave bear. The cave bear (Ursus spelaeus) was a species of bear that lived in Europe during the Pleistocene and became extinct at the beginning of the Last Glacial Maximum, about 27,500 years ago. Mammoths can be seen in the background. A mammoth is any species of the extinct genus Mammuthus, proboscideans commonly equipped with long, curved tusks and, in northern species, a covering of long hair. They lived from the Pliocene epoch (from around 5 million years ago) into the Holocene at about 4,500 years ago in A
RMG15NFA–Meganeura is a genus of extinct insects from the Carboniferous period, which resembled and are related to the present day dragonflies. Meganeura were predatory, and fed on other insects, and even small amphibians. Carboniferous is the fifth period of the
RMHRJ9YF–Prehistoric, Jurassic Landscape
RMHRJ9YD–Prehistoric, Triassic Landscape
RMG15NF8–Chirotherium, also known as Cheirotherium (hand-beast), is the name of a Triassic archosaur known only from fossil imprints of its tracks (trace fossils). Its tracks were first found in 1834 in red sandstone in Thuringia, Germany, dating from about 243 mi
RMHRJHRC–Prehistoric, Devonian Landscape
RMHRJ9YA–Prehistoric, Devonian Landscape
RMHRJ9YK–Prehistoric, Eocene Landscape
RMG15NFG–Eocene landscape (56 to 34 million years ago). The second oldest of the five major worldwide divisions (epochs) of the Tertiary Period (Cenozoic Era), the interval of time (epoch) extending from the end of the Paleocene Epoch to the beginning of the Oligo
RMG15NFB–Devonian is the fourth period of the Paleozoic Era, encompassing an interval of geologic time between 418 and 362 million years before present based on radiometric data. The Devonian System encompasses all rocks deposited or formed during the Devonian Per
RMG15NFC–Devonian is the fourth period of the Paleozoic Era, encompassing an interval of geologic time between 418 and 362 million years before present based on radiometric data. The Devonian System encompasses all rocks deposited or formed during the Devonian Per
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