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      • The Tetori Group is a stratigraphic group in Japan, found within several basins in and around Fukui Prefecture. It is Early Cretaceous in age. It primarily consists of freshwater continental deposits, with some beds of volcanic tuffite. It primarily overlies Jurassic marine sediments or gneiss basement. Some of the units within the group are noted for their fossil content, including dinosaurs, lizards mammals and other vertebrates.


      Stratigraphy


      The term "Tetori Group" was first used by Oishi in 1933. A significant revision was made by Maeda in 1961 which subdivided the Group into three subgroups, which in ascending order are the Kuzuryu Subgroup, the Itoshiro Subgroup and the Akaiwa Subgroup, alongside the Omichidani and Asuwa Formations, which were subsequently excluded from the group. Recent stratigraphic revisions have split off the Kuzuryu Subgroup into the Kuzuryu Group, which is Mid to Late Jurassic in age and is largely marine. There is significant lateral variation within the Tetori Group, with completely different sequences of formations in different areas, so it is difficult to correlate different sequences into the different subgroups, so the Itoshiro and Akaiwa subgroups are now considered depreciated.


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    Tetori Group - Wikipedia

    The Tetori Group is a stratigraphic group in Japan, found within several basins in and around Fukui Prefecture. It is Early Cretaceous in age. [1] It primarily consists of freshwater continental deposits, with some beds of volcanic tuffite. It primarily overlies Jurassic marine sediments or gneiss basement. Some of the units within the group ...

    Fauna and flora of Early Cretaceous Tetori Group in Central …

    01 Jun 2017 · The Early Cretaceous Tetori Group (Oishi, 1933) is a thick, generally non-marine, siliciclastic sequence, sporadically distributed in the Hakusan Region in northern Central Japan (e.g., Maeda, 1961, Kusuhashi et al., 2002, Sano, 2015; Fig. 1).

    New goniopholidid specimens from the Lower Cretaceous …

    01 Jan 2024 · Although the most abundant fossil record including skeletal remains of Mesozoic crocodilians in Japan has been reported from the Lower Cretaceous Kitadani Formation, Tetori Group (Azuma, 2003), no detailed reports of these crocodilian material have been completed yet.

    New theropod dinosaur from the Lower Cretaceous of Japan …

    07 Sep 2023 · The Aptian sediments rich in dinosaur remains occurs in Fukui, central Japan, namely the Kitadani Formation of the Tetori Group, from which three theropods, two ornithopods and a sauropod have...

    The Cretaceous Tetori biota in Japan and its evolutionary …

    The Tetori Group is one of the most important Mesozoic terrestrial deposits in East Asia, and for this reason its geology, stratigraphy, and biota have been studied intensively by our group for more than a decade.

    SEDIMENTARY ENVIRONMENT OF DINOSAUR FOSSIL …

    The Lower Cretaceous Kitadani Formation, Tetori Group in the Kitadani Quarry yields a large quantity of non-marine fossils including dinosaurs. The quarry has large exposure with westward and northward facing surfaces, which allow to analyze three-dimensional variations in composition and geometry. The successions at the quarry consist of

    New view of the stratigraphy of the Tetori Group in Central Japan

    25 Des 2015 · These strata except Albian volcanic/plutonic rocks were previously called as the Tetori Group (s.l.), but are divided into four different groups: the Kuzuryu, Tetori (s.s.), Jinzu and...

    Depositional and compositional controls on sandstone diagenesis…

    01 Mar 2007 · The Tetori Group is a representative Middle Jurassic to Lower Cretaceous deposit in the northern central part of Honshu, Japan. The Tetori Group is divided into the Kuzuryu, Itoshiro and Akaiwa Subgroups with decreasing age.

    DESIGNATION OF THE TYPE SECTION OF THE TETORI …

    Lower Cretaceous part of the Tetori Group (sensu Maeda, 1961) is referred to as the Tetori Group sensu lato (s.l.) in this note. Maeda (1961) divided the Tetori Group (s.l.) into three subgroups: the Kuzuryu (Middle to Upper Jurassic), Itoshiro (Upper Jurassic to Lower Cretaceous), and Akaiwa (Lower Cretaceous), in ascending order.

    Preliminary survey on the Tetori Group in southern Ishikawa, …

    The Tetori Group is a Mesozoic stratum distributed discontinuously across six prefectures of North-central Japan, including northern Gifu, eastern Fukui, southern Ishikawa, central-southern Toyama, northwestern Nagano, and southwestern Niigata (Figure 1). In 1874, the German Rein found plant fossils in Kuwajima of