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Lower Cretaceous Kitadani Formation of Japan + Chinese stegosaurs + more papers, pdfs



Ben Creisler
bcreisler@gmail.com


Some recent papers + a couple of older pdfs:


Free pdf:

Shigeyuki SUZUKI, Masateru SHIBATA, Yoichi AZUMA, Hirokazu YUKAWA,
Toru SEKIYA and Yuto MASAOKA (2015)
Sedimentary environment of dinosaur fossil bearing successions of the
Lower Cretaceous Kitadani Formation, Tetori Group, Katsuyama City,
Fukui, Japan.
Memoir of the Fukui Prefectural Dinosaur Museum 14: 1–9
http://www.dinosaur.pref.fukui.jp/archive/memoir/memoir014-001.pdf

The Lower Cretaceous Kitadani Formation, Tetori Group in the Kitadani
Quarry yields a large quantity of nonmarine 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
clastic rocks of the Point Bar Facies, the Abandoned Channel-fill
Facies and the Over Bank Facies. The sandy Point Bar Facies is
characterized by sheet like geometry and sedimentary structures caused
by lateral accretion. The Abandoned Channel-fill Facies is mainly
composed of fine-grained sediments, which were considered to be
deposited by suspension fall-out. The depth of abandoned channel is as
same as the thickness of the unit of the Point Bar Facies. The Over
Bank Facies is characterized by poorly sorted nature of deposits.
Crevasse splay sandstones are frequent in the Over Bank Facies.
Sedimentary environment of an alluvial plain formed by meandering
river is reconstructed.

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No pdf for now:

Jiang Shan, Peng Guangzhao & Ye Yong (2015)
Chinese stegosaur dinosaur fossils.
Journal of Geology 39 (4): 530-534
http://www.journalofgeology1977.com/ch/reader/view_abstract.aspx?file_no=20150402&flag=1

China has a vast territory, with well-developed and widespread
Mesozoic continental sediments. It contains nearly a hundred of
dinosaur fossil localities, which range from the Shandong Peninsula of
eastern China to Gansu and Xinjiang Provinces of the western China,
from the Yunnan and Sichuan of southern China to Inner Mongolia and
Heilongjiang Provinces of northern China. At present, China has the
most dinosaur fossils all over the world, including up to 210 species
of named fossil species. A total of 9 genera and 10 species of
stegosaur fossils have been discovered in China, including
Huayangosaurus, Tuojiangosaurus, Chialingosaurus, Gigantspinosaurus
and Jiangjunosaurus. The discovery of Huayangosaurus provides evidence
for the origin of stegosaur. The original burial condition of spinae
parascapulares of Gigantspinosaurus sichuanensis helps to reveal their
functional significance. The discovery of skin impression of G.
sichuanensis offers new understanding of the stegosaur epidermal
structure.



For  photos of  Gigantspinosaurus from 2006:

http://www.ivpp.cas.cn/jgsz/gkxh/gjzdwxh/nhlwj/201201/P020120116405635834187.pdf

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No pdf for now:

Qian Maiping, Ma Xue, Jiang Yang, et al. (2015)
Southwest China Triassic marine biota and their mass mortalities.
Journal of Geology 39 (4): 519-529
http://www.journalofgeology1977.com/ch/reader/view_abstract.aspx?file_no=20150401&flag=1

The Triassic marine biota in southwestern China mainly include
reptiles, fishes, echinoderms, ammonoids, bivalves, gastropods and
arthropods, and their fossils are distributed in grey black calcareous
mudstone and argillaceous limestone beds of the Middle-Upper Triassic
Guanling Formation, Zhuganpo Formation and Xiaoao Formation in
Guanling, Xingyi, Panxian counties of Guizhou Province and Luoping
County of Yunnan Province. The great disparity and abundance of the
biota suggest that creatures on the Earth started to enter a new stage
of rapid evolutionary radiation in the Middle Triassic after the
end-Permian mass extinction and the early Triassic relative stagnation
stage. These various kinds and growth stages of marine creatures
experienced mass mortalities at almost the same time, and were
immediately buried and preserved as fossils, which indicates repeated
sudden catastrophic events during that time. This may be closely
related to the geographic location of the biota, i.e., in a bay basin
at the actively tectonic boundaries of the South China Block, Jiangnan
Orogenic Belt and the Indochina Block. The repeated submarine
earthquakes and volcanic activities during the Indosinian orogeny
resulted in the formation of hydrogen sulfide in deep water reducing
environments in the basin. The hydrogen sulfide and carbonate-rich
seabed ooze moved together upward to mix into high-density turbid
water, and invaded the clear shallow-water oxidizing environment where
the biota lived, causing sudden mass mortalities of marine creatures
from poisoning and suffocation. Subsequently, their remains were
rapidly buried by silt carried by the toxic water, and formed superbly
preserved fossils in grey black calcareous mudstone and argillaceous
limestone beds in later diagenesis


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An older item that may be of interest, with photos and artwork (in Russian):

Free pdf of Guide to the Paleontological Museum in Moscow (2012)

http://www.arran.ru/data/collections/col18.pdf