Schedule of field excursion
Day one (Saturday, September 30)
We will travel from Hayama on the Honshu Arc to the Izu Peninsula that marks the northern end
of the Izu-Bonin Arc.
Stop 1: The Tanna Fault in the middle Izu Peninsula.
ĦĦĦĦĦĦIt was displaced left-laterally with the Kita-Izu Earthquake of M7.3 in 1930.
Stop 2: The Upper Miocene Shirahama Group on Dogashima Coast, western Izu Peninsula
The group consists largely of submarine pyroclastic rocks,
which are essentialto understand the past and present volcanic
activities of the Izu-Bonin Arc. We will stay in Shimoda in the
southern Izu Peninsula. Shimoda is a historical city where two treaties
of peace and amity were concluded;
one was with the USA (by Admiral Perry) in 1854, and the other with Russia
(by Admiral Putyatin) in 1855. The lodging here boasts spa.
Fig.1. Hot pyroclastic debris flow deposits.
Day Two (Sunday, October 1)
We will travel from Shimoda to Hakone Volcano running through the backbone range of
the Izu Peninsula.
Stop 3: Hakone Volcano, northern Izu Peninsula to observe the caldera and geothermal activities
(Fig.2). There are lots of sight-seeing spots of both geological and historical interest. At the
caldera rim, the excellent scenery of Mt. Fuji is visible beyond the Izu-Tanzawa Collision
Zone. We will stay by the shore of Ashinoko, the caldera lake. The lodging here also
Fig. 2. Caldera rim and the caldera lake, Ashinoko. Faraway snow-capped stratovolcano is Mt.Fuji
Day Three (Monday, October 2)
We will move to the piedmont of Hakone Volcano.
Stop 4: Hot Springs Research Institute of Kanagawa Prefecture. The institute has been
monitoring the seismicity of Hakone Volcano and its surrounding area since 1968.
We will transfer from Hakone Volcano into the Izu-Tanzawa Collision Zone.
Stop 5: Kozu-Matsuda-Kannawa Fault System on the northern border of the Izu Peninsula. The
system corresponds to the boundary between the Philippine Sea and the Eurasian plates.
Stop 6: The Quaternary Ashigara group that filled up the trough along the convergent boundary
between the two plates.
We will arrive at JR Odawara Station at about 3 pm.