Amidagawa Pyroclastic Flow Deposit

Amidagawa Pyroclastic Flow Deposit Yamamoto, 2017

Type locality: Kusatanihara, Daisen city, Saihaku county, Tottori prefecture
Volcanic rocks
middle Pleistocene (20.9 - 18.7 ka cal yBP, ¹⁴C)

Sedimentary facies: Pyroclastic flow deposit
Sedimentary facies (Bottom): Pyroclastic surge
Lithofacies: Clinopyroxene-bearing orthopyroxene-biotite-hornblende dacite
Lithofacies: Block-and-ash flow deposit

Source: Sankoho Lava Dome
Eruptive volume: 0.0067 km³ DRE
Thickness: 4 - 5 m
Lower limit: Conformity? (Kusatanihara Tephra)

Young stage
[ Upper ]
+__+__+__+__+_
Volcanic fan 1 deposit
?--?--?--?--?-
Volcanic fan 2 deposit
~~~~~~~~~~~~~~
Sankoho Lava Dome / Amidagawa Pyroclastic Flow Deposit
?--?--?--?--?-
Volcanic fan 3 deposit
~~~~~~~~~~~~~~
Misen Lava Dome / Masumizuhara Pyroclastic Flow Deposit
?--?--?--?--?-
Karasugasen Lava Dome / Sasaganaru Pyroclastic Flow Deposit
--------------
Makibara Pyroclastic Flow Deposit
?--?--?--?--?-
Volcanic fan 4 deposit
?--?--?--?--?-
Furikosen Lava Dome / Nawa Pyroclastic Flow Deposit
~~~~~~~~~~~~~~
Volcanic fan 5 deposit
~~~~~~~~~~~~~~
[ Lower ]

Daisen volcano
[ Upper ]
+__+__+__+__+_
Young stage
~~~~~~~~~~~~~~
Old stage
~~~~~~~~~~~~~~
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Amida river, Mount Daisen, Tottori pref.;Kusatanihara, Daisen city, Saihaku county, Tottori pref.

Yamamoto (2017) Bull. Geol. Surv. Japan, vol.68, no.1, pp.1-16 DOI