Excursion B (Inuyama)

Triassic to Jurassic Radiolarian Events in the Panthalassa Ocean Recorded in the Mino Accretionary Complexes

  • Contacts: Tetsuji ONOUE (mailto: onoue@sci.kumamoto-u.ac.jp), Rie S. HORI, Satoru KOJIMA
  • Price: 49,000JPY/person
  • Allowable participants: Min 15, Max 20

This trip will focus on radiolarian response to global catastrophic events (such as bolide impact, large volcanism and anoxia) recorded in the Triassic to Jurassic radiolarian chert from the Mino accretionary complexes, central Japan. The radiolarian chert of the Mino accretionary complexes records the sedimentary history on an oceanic plate in the Panthalassa Ocean prior to accretion at the trench. The following topics will be presented and discussed in the field:

  • End-Permian mass extinction.
  • Early Triassic anoxia and its subsequent recovery in the Middle Triassic.
  • Paleoenvironmental changes across the Early/Late Carnian boundary (the Carnian pluvial event).
  • Collapse of marine ecosystem triggered by a Norian impact event.
  • Ocean acidification at the Triassic/Jurassic boundary.
  • Early Jurassic (Toarcian) anoxia and the formation of black shale.

In addition to these topics, this trip will include aspects of the accretion process of oceanic plate sediments during the Middle to Upper Jurassic. The excursion will start from Nagoya and will end in Niigata near the conference place.


Traditional gassho-zukuri farmhouses in Shirakawa-go (STOP 8)


Outcrop view of a Triassic-Jurassic bedded chert succession at Sakahogi (STOP 4)


Pre-conference Excursion B (Inuyama)
DAY Date Time Stops Evetns Accomodations Inclusive Not inclusive
One day before the start (Thursday) 19 Oct. 2017 Arrive at Nagoya stations by yourself The Chisun INN Nagoya
(single room)
Hotel fee Dinner
1st (Friday) 20 Oct. 2017 8:30 Meet in the front of the Chisun INN Nagoya Breakfast
9:00 Leave the hotel
10:15 Stop 1 The Unuma section: Triassic-Jurassic radiolarian chert and associated siliceous rocks
12:00 Stop 2 Lunch at Momotaro Park Lunch
Lower Triassic siliceous claystones and Upper Triassic radiolarian cherts
15:30 Stop 3 Inuyama Castle Entrance fee
17:30 Arrive at the hotel The Inuyama International Youth Hostel
(double room)
2nd (Saturday) 21 Oct. 2017 8:30 Leave the hotel Breakfast
9:00 Stop 4 The Sakahogi section: the Norian impact ejecta layer, Triassic/Jurassic boundary, and Toarcian OAE in Triassic-Jurassic chert succession
12:00 Lunch at Rock Garden Hichiso Lunch
13:00 Stop 5 Kamiaso: Precambrian gneiss clasts-bearing debris flow conglomerate in trench-fill turbidite succession
14:30 Stop 6 The Hisuikyo section: Middle Triassic to Lower Jurassic radiolarian chert
16:00 Leave the Hisuikyo section
18:00 Arrive at the hotel The Route-Inn Grantia Hida Takayama
(single room)
3rd (Sunday) 22 Oct. 2017 7:00 (Stop 7) Option (Takayama Morning Market) Breakfast
9:00 Leave the hotel
10:00 Stop 8 Shirakawa-go area
12:00 Lunch Lunch
12:30 Leave Stop 8
17:30 Arrive at JR Niigata Station Dinner

Note: All attendants need to arrive at the ONE DAY BEFORE the start as this excursion starts in very early morning