Contributors ................................................... vi
Abstract ...................................................... vii
Introduction
(Y. Shigeta, Y.D. Zakharov, H. Maeda, A.M. Popov,
K. Yokoyama and H. Igo) ...................................... 1
Paleogeographical and geological setting
(Y. Shigeta, H. Maeda, K. Yokoyama and Y.D. Zakharov) ........ 3
Stratigraphy
(H. Maeda, Y. Shigeta, Y. Tsujino and T. Kumagae) ............ 4
Biostratigraphy
Ammonoid succession (Y. Shigeta, H. Maeda and
Y.D. Zakharov) .............................................. 24
Conodont succession (H. Igo) ................................ 27
Correlation (Y. Shigeta and H. Igo) ......................... 29
Age distribution of detrital monazites in the sandstone
(K. Yokoyama, Y. Shigeta and Y. Tsutsumi) ................... 30
Discussion
Age data of monazites (K. Yokoyama, Y. Shigeta and
Y. Tsutsumi) ................................................ 34
The position of the Abrek Bay section in the "Ussuri
Basin" (Y. Shigeta and H. Maeda) ............................ 36
Ammonoid mode of occurrence (H. Maeda and Y. Shigeta) ....... 36
Aspects of ammonoid faunas (Y. Shigeta) ..................... 38
Holocrinus species from the early Smithian (T. Oji) ......... 39
Recovery of nautiloids in the Early Triassic (Y. Shigeta) ... 40
Brief note on the bivalve fauna of South Primorye
(K. Nakazawa) ............................................... 43
Systematic Paleontology
Cephalopods (Y. Shigeta and Y.D. Zakharov) .................. 44
Scaphopods (Y. Shigeta) .................................... 140
Gastropods (A. Kaim) ....................................... 141
Bivalves (T. Kumagae and K. Nakazawa) ...................... 156
Brachiopods (A.M. Popov) ................................... 173
Crinoids (T. Oji) .......................................... 180
Conodonts (H. Igo) ......................................... 181
Chondrichthyans (H. Yamagishi) ............................. 196
Concluding remarks
(Y. Shigeta, Y.D. Zakharov, H. Maeda and A.M. Popov) ....... 202
Acknowledgments ............................................... 203
References .................................................... 203
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