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Chronology of the Products of Fuji Volcano Based on New Radiometoric Carbon Ages
Takahiro YAMAMOTO῍, Akira TAKADA῍῍, Yoshihiro ISHIZUKA῍῍ and Shun NAKANO῍῍The previous eruption history of Fuji volcano has been re-examined by new +** radiometric carbon ages.
The major unconformity between Ko-Fuji and Shin-Fuji volcanoes of Tsuya (+302, +31+) was caused by theediﬁce collapse resulting in the Tanukiko debris avalanche at about Cal BC +2,***. Voluminous e#usion of basalt
lava ﬂows in the older ejecta of Shin-Fuji volcano (Tsuya, +302, +31+) had started at about Cal BC +/,*** andcontinued until about Cal BC 0,***. Deposition of black soil layer between the Older and Younger Fuji tephra
layers of Machida (+30., +311) started at Cal BC 2,***. After several thousands years quiescent time, basaltic
eruptions in the middle ejecta of Shin-Fuji volcano (Tsuya, +302, +31+) had restarted at about Cal BC -,0** andthin lava ﬂows had piled up as the central volcanic cone, until about Cal BC +,1**. The eruption style of the
volcano changed into explosive basaltic eruptions from the summit and the ﬂank at about Cal BC +,/** ; the S-+*
to S-,, scoria fall deposits were generated in this ﬁrst half period of the younger ejecta of Shin-Fuji volcano(Tsuya, +302, +31+). Also, basaltic pyroclastic ﬂows cascaded down the western ﬂank at about Cal BC +,/**, Cal
BC +,-**, Cal BC +,*** and Cal BC 11*. The last summit explosive eruption (S-,,) occurred at about Cal BC-**. Immediately after the S-,, eruption, basaltic ﬁssure eruptions had repeated at the ﬂanks until the +1*1 Hoei
eruption. New data suggest that the Fudosawa, Nissawa and Suyama-tainai lava ﬂows in the southern ﬂank arehistorical products at about Cal AD +,***.
Key words : Fuji volcano, radiometric carbon age, eruption history+ῌ ῐ ῎ ῑ ῏u1 +322 78 D[PD ()MfBChG  
+,-.



v$wxN'&7& ()BC _`abc!"#$%&'()* $/0 123 4

Dy7z @%{B|7}bc

356 () +31+ 78 $/9:&;$<=>

~@AS-'AGP\ () +3.* $:  ? @A7BCDEFG H"

$ !_`abcMBC "DI J 12KL MN'OFGP () +302

7& M$#w$NFD[P4BCQR$BCQS-'P() TU$ , VWXYZD[P\M]^'&P (

12d J 12KL %Pg &" ++ @A'12K(56Q) +3.* N@N _`abcBCQde

NP ()MfBC&Q)^

Pf (+30. +311)  ():  ? U?N&BCQGA$

MD7*+WXQgh BiQj$:k M?

k QlNP Hm\ _`aBC3$`abcQT bc@A¡¢NP£. +** ¤,(): -k_4_/nop q r +311 ; st r +313 ;¥/70¦§¨©ZªQ«¬N ­1BC* ®-*/ῌ2/01 ¯°±%z²³ +ῌ+ῌ+ ´ 1µ¶·¸56¹º212»j56
Research Center for Deep Geological Environments,
Geological Survey of Japan, AIST, Central 1,
Higashi +ῌ+ῌ+, Tsukuba, Ibaraki -*/ῌ2/01, Japan.
** ®-*/ῌ2/01 ¯°±%z²³ +ῌ+ῌ+ ´ 1µ¶·¸56¹12¼35624

Institute of Geology and Geoinformation, Geological
Survey of Japan, AIST, Central 1, Higashi +ῌ+ῌ+,
Tsukuba, Ibaraki -*/ῌ2/01, Japan.
Corresponding author : Takahiro Yamamoto
E-mail : t-yamamoto@aist.go.jp

g²³´Aµ® ¶A·¸¹ºA?» ¼

54

Fig. +. Map for the sample localities in Fuji volcano. Solid lines are the Fujikawa-kako faults. Fj±Fuji River ;Ho±Mt. Hoei ; Hs±Hoshiyama Hills ; Om±Omuroyama ; S±the summit of Mt. Fuji ; Sr±Shiraito Fall ; Tn±
Lake Tanuki ; Ur±Urui River ; Ym±Lake Yamanaka. Parts of the topographic maps of Shizuoka and Kofu,+ : ,**,***, by the Geographical Survey Institute, Japan.



 (+31+)  (+322)  !"#$%&'()*+!,-./01234

56789:;<= >AMS = ; ?@A?

B +322C ,DE:FG;<,D1 0H *-IHJK LM NOPQKJ*+R-S  TJ, 34 ;< 5 d +-C UV,DWX
Y;Z[\]^\ >_@ +33/C `ab 
Fig. ,. Schematic history of Fuji volcano by previous studies.

,ῌ ΐῐ῎῏῍ῒῑ cdefghdefg i; jk5 +) c
defglSm5nogῌ depq derst"
uv >Fig. + ; wrAx +330C ,Dyz{|X}~+302C TJ, 5hdefglSm,21 

- hdefglSm5  5229 $u;

$2 ,) cdefglSmhdefglSm

,i;b



u -) gῌ,21cdefglS

m5fgm- , hdefglSm5g
ῌ !- 2 y fg ,5- J012> +3.*

2KJ¡A?Ah(Fig. ,) /¢¡5gῌ£,¤Sb ?5¡¥2Kg¦,; h5§¨©ª«¬2;2- > +302 +31+C0,b ­® (+30., +311) 5 gῌ ¯wf°» ¼K p&¡)  

 !"#  $%&'() *&'().$%ῌ /012345+678efgh.
$%$% ῍ !+, -$%WoK$%55

, -5#

p}x-

.

Y&j

(+302) 8=$>}&j.:;<(+321) xRS (+322) -99_. oK, + & Y&~!+ (Fig. ,), 9+ :; < (+313) 8=$>

&j.{+ !?@ABA CDE $% F.s!&+, va}~T &j.

G!HI1J)!"#  + KL?@AM&

W45)Sbcds!&),

NOP!

NOPQ+, RS(+322)  $ T1 UV 8=$>WX

YWZ![\]^_+ + KL$%!-ῌ ῕῍῎ῒ῏῔ῑῐΐ K

p_+

$% 01 S

 (Fig. +, Table +) 0/ A}+ +** $%Q+,`aSbcdefgh   Yi&j.
kG45l.mn -]j&j.opK p}!HI} G (a) } (b) 

1}¡n=¢ b0£ (c) }¡n=¢ va Ywxy:=HI&z_.{50£ G (d) }¡n:¢ b0£qr

1J)s!tu.), J),

1J)^Q(e)  / j&i+ (Table ,), ¤¥r¦&

, 9+ 8=$>}&j.BV&§¨©ª«¬4­ ®¯&¡n°±²³´µ¶RS (+322) ~Jn (Fig. ,) ~

¥n·+, ¸ BETA ANALYTIC ¹&º|(+302) Sbc&[\

Table +. Sample localities for radiocarbon dating in Fuji volcano. Latitudes and longitudes are shown
by JGD,***.



56
Table ,.

 

Results of radiocarbon dating for the products of Fuji volcano.

AMSaccelerator mass spectrometry method ; Radradiometric method ; Mmaterials ; acharredmaterial within the deposit ; bwood within the deposit ; corganic sediments below the deposit ; dcharred material below the deposit ; eorganic sediments above the deposit. AokiD-100. is dated by
Shimokawa et al. (+330).


Table ,.


Continued57

58 
Table ,.

Continued  
Table ,.


Continued59

60 
Table ,.

Continued  }~Z&:;<+$ ¼
 ῌ
 ῌ 

FJM-, ~ H5 TnDA or %sn +*... m( t! ;<

8IJH>?u +* g  /  b  g

61

!



v

RSsn +*0.. m +1,,3*+,* yBP (FJM---) sn +*0.1 m  +2,13*1*
yBP (FJM--.) sn +*0.2 m  +2,2,*+/* yBP (FJM

" #$ 3/  AMS  --/) sn +*1.+ m  +3,,/*1* yBP (FJM--0)

 RCYBP %AD +3/*  * &'( ) w (Fig. -) FJM--+ $*+ d +-C!,-. "
012314#5

/! Stuiver et al. (+332)

 " 6$ Talma and Vogel (+33-)

7

 Q

+

Euz<>?or)

yL&N[

R 

B<P@ .W &:K {K %Fig. +. 

{TnDA

L* c5*.ῌ- "#$#5

,mxx okJuy



Ur( 

N)GGv|5$' OLF

zQ&H5^V }~.ῌ+ 

 %8 (+31+)  ,.,+**+** yBP H5%8 9&:;<' ()*&:;<+$,+1,1**-** yBP=>$ ?
!

m@)-.</

0A<B1C ,,1**2.</D3E4E " ;FE&GῌH.d +-C v ! "

Y (+331)  ,1,3**0** yBP H5 +2,03*-** yBP+/ d +-C v ! ? G Q

5$'IJ* %%8 +3.* +31+( @6 -7

5  RS¡6 Yamazaki (+33,)<8 &:K9: %8 (+302) 9&:;<&L

V Mf-III E FG+ . 

MN9&:;< <8)O='>?P@*G

opq

A' Q RS&:K 7.B<P@ %Fig.

!< BKP@ + & V@G>$ -7<8

9&:;< C / D %Mf-I E( &C ,H!+ Mf-III EknGQ&y*-+Hs(

GSJ-FJM, ~H5w5 OLF

OLF 



DT %Mf-II  -III E( FGGHUE Mf-III E&:K¢H -.&:KXYL

V;<8IJH>? (OLF) H5*$ B<P@

M(KLZ- P@C 2* m.W.&:KXYLMZ7N$ O[\] (Yamazaki, +33,)

£O[\] (Fig. - ; Yamazaki, +33,) &:KXYLM

Fig. - ¤ZR OLF &%8

PXQR^_1`ab SNcT).dL{Ep*N>?¥HQ& `¦ a.$ LO[Z-UV%8 *&:;<+$!WXGe

OLF P@&GHf @6 B<P@ 2.Ygh %Fig. +Tn(*&:4E<<'§Z(z*HU¨O.-Q&©G <8

AH5'&%8

TnDA

9&

:;< <'§7H5-7ª§V-

9: >? KH"Z (,**+) iGZR

& Q HU%8 (+31+) BKH (+322)

[j \FD3E4E";FE Ek]&^«'*&:;<+$u ..-9&:<'­¦t!

l EmnGo]H5*Ep*N>?

C$]' .¬R TnDA

. %YghEp*N>?&QQq_' ;. FJM--+ ®

TnDA ; Fig. -( `r stau b %Fig. +%Cal BC +2,*** ±( &¥Q&$V (Fig. -) Q!< +./ km

Sr(

vKwxycz TnDA  OLF d,, {|e*fgEU=* hi
Ljst er5-7<8,-}1~* & : ; < 4 E < & OLF &{kn'>?t ¯° +1 ka

OLF V Mf-III E FG&²³ l@' @6L£G!<
B<P@1  (GSJ-FJM-+, GSJ-FJM-,) +ycz %8B<P@z<

Mf-III EN TnDA >?G*?´ TnDA Mf-III EO[µL¶ t.-&5

TnDA ycG %Fig. - ; <"Z ,**+( H&kn) Al>Z? +/+* km  >?d +* m mn. >?

'? km

Q&y.
.ῌ, 



 !


-

/ %&'()* /ῌ+ 

%8 (+302 +31+).M + N &:Ko p q (Loc. +0)

Lj *&:;<+$ R

SLj![.$ ·<85$'4E<¸¦+$& 4E<D3E¹º»ª«¬­= ®¯°±² ³

62

Fig. -. Columnar sections and an index map of the borehole cores. The Aoki D-+ section is taken from Shimokawa et al. (+330). The Yamamiya section is our unpublished data observing the core of the Fujinomiya
City. Ak©Akaiwa ; Aos©Aosawa lava ﬂow ; Fk©Fujikawa-kako faults ; OLF©Ko-Fuji fan deposits ; SML©
Middle-period lava ﬂow of Shin-Fuji volcano ; SOL©Older lava ﬂow of Shin-Fuji volcano ; Tn©Lake Tanuki ;TnDA©Tanukiko debris avalanche deposit. The topographic image has been made using the digital map /*mgrid (elevation), by the Geographical Survey Institute, Japan.

   

Y945jkl45mno (Loc. ,.) paq!"#$%ῌ&'(r (SSW+) st2uP9vwxy (FJM)*+ ,-./012 345.026 789:;

-*.) XYz{| 3+. ka ; } +313 ; ~ +33-6



3<= +30. +311 ; >? +3226 <=#@.02 A

BCD EF G45)*+H I45)*+H +.,+2* 1* yBP @ X 45>jx (Loc. ,+)  Aoki-D+  //..N10..

JKL (Fig. ,) >? (+322) 2M# m iuX!Y! 3xO9:; P >SP-.  6 svw (Aoki-D100. ; Fig. -)I45AB# ++N2 ka?#.02QRABSTUVWXYZ[\])*+QJ^_`a@
2N../ kabYX cd

:;XY ++,.,* 0* yBP 3m +3306 (Loc.

-/)  (SE+) st2vwxy (FJM--+) XY +*,+**

0* yBP, (Loc. +)  /ῌ, ῐῒῑ῏῔ῌῐΐ῎῍

 I (NW+*) vwx (*-*/,*ῌ/) XY 3,.1* .* yBPI45efgThi EF

3?¡¢#£¤¥ II ¦§¨iT)}BCRS!"'B

63

Fig. .. Outcrop sections around Fuji volcano. FBFuji black soil layer, GoDAGotemba debris avalanche
deposit, MuMurayama scoria, OsOsawa scoria, SW+Shibakawa lava I, S+S,,Subashiri +,, scoria,
TnDATanukiko debris avalanche deposit, UmDAUmakoshigawa debris avalanche deposit. See Table , forthe details of +. C ages.

 

 II 

LHb9: (FJM.-+)  2,12*,/* yBP, '(cV I   !

(Loc. /,) [\!"]^_`7a FB JKLHb"#$% (Loc. ,,) &' II (SW/) ()*+9: (FJM--*)  2,0**,1* yBP BCDEFG(FJM.*0)  3,,3*,0* yBP, -'. (Loc. ,0) /2

FJM.-+  ade+f (+320)  FB JKM 3,11*

 I (SSW.) ()*+ (S-*.*+)  3,*-*,.*,,,* yBP  +*,-.*,,-* yBP  d +-C ghiBCDE



0 1 

yBP, -'. (Loc. +3) 34' I (SSW+,) ()jklmnmIopqG r

*+ (FJM,*0)  2,01*,.* yBP, -'. (Loc. ,/) s ;. (Loc. ,-) t# I (SW+) Euv4'w

56 II (SSW1) 789: (++,2C-+)  1,--*8xyz{ (Mu) a FB JKLHb9: (FJM.*1)%=?@A,/* yBP, ;'. (Loc. ,) < >  (Inu) ()* 1,23*,0* yBP, -. (Loc. ,*)  Mu a FB J

+ (*++*+3ῌ+ῌ,)  1,*2* , /* yBP BCDEF

KL)*+ (FJM+*+)  1,,.*,1* yBP BCD

(Table ,)GEFG |IoBC RS}~l

!"H9I (FB) JKLM N . OP Q

@rM%GBCRSETU (Fig. . ; Table ,)G V'.WX?

V'.

'#$%[\!"]^_`7a FB JK(Loc. .1 ; Fig. .)  (GoDA)YZ (Loc. /*)*µ¶·I¸64

XI¹Yº»ICZ ¼
3u#43tK-EL##r$& +,***+,/** 56 C$& ^ d +-C 7kWp%L)q& 89$#C E#E& :#4 FB N;#$LFI2
(+320) pw +* ka [D:C

1#\ STU *<=* FB N;> +,*** BC

(+30., +311) XZ;

\
`%

:;<=>?@"LBC
(Fig. ,)& ST:;<=>?@F? FB N

;UVWFig. /. Calendar ages for the mud-ﬂow deposits of
Ko-Fuji volcano (OLFm ; Tsuya, +302, +31+),
the older ejecta of Shin-Fuji volcano (Tsuya,+302, +31+) and the Older Fuji tephra (Machida, +30., +311). *´age data from the underlying unit. Hatched area shows the plausible
range of the dated unit.

@<N/

E#E$& AB/"EpwL:;<=>?@C vK Cal BC +/,***[#$A\Z;

"D#$#\BCC *XY<Z;
-EECf& *o:* O@<& :;<=>?U
EF S@K}0FGM
UmDA C HCal BC 0,.** [J &  !"

 GoDA 

#$%&  (UmDA) ()

M UmDA 

IwC S/ (R I) o1 ¡¢ S0
'

*+

* , ,.0 -./0123'4456789 &, Hs;?L(R II) o1 ¡¢J ABC (Fig. .) ^£'Hs;Y<Z;K& Cal

BC 0,*** ¤¥$:;<=>?@ ABCDE& FG Mf,  +0./ ka, G Mf+ 0  ,* ka E H

0ῌ+ 

& +330 ;I& +332& p. 2J

UmDA FG:;<=>?@ (Fig. .)& , $#KL

M



X (+302, +31+) Y<*" 8*¦*

UmDA NOP%QA (FJM.,,)s;

#$& 1,/2*R.* yBP  (Table ,)

E O¢¢/ῌ- 

STUVW#$& XY<Z;

C;"E 

LM§#$*Nx

& *L¨*N©O¨#$ 
Hu0ª/ª/J #$ ]# (+322) « & C;  P!

 S-/IS-0 o1 ¡¢"Q#$ S-3 o1 ¡Cal BC +/,*** #$ Cal BC 0,*** ["E¢s;D% (Fig. ,)& ^ ../- ka i$#\ (Fig. /) ]# (+322) ^A _$BCN& XY<Z;`%;a ++ ka #0ῌ, 

$ 2 ka EB&bcdc"' +-.+ km- ῌ +,*** eXY<C;"w¬*¦RxLf& ^`%;a - (gh +iEB& n"#$ (Table ,) jkilm$C ^ L& XY<Z* (Loc. +1) ­®*¯¨°±ST*

;&bcdc"']# (+322) DE ../ ka n(Anm) CU²2 (FJM+*,) #$ .,00*R2* yBP,o"'p%L)qC*r%C s;

=*N (Loc. .-) V 

+tBcdc"'u M\#vw#xCB

2 (++,2C-+) #$ .,*2*R.* yBP, MKL. V 

& yz{,|- M%./}0ST
1#\* ~L Cal BC 2,*** [#$ FB 
A\BC STU FI2 (+320)

IV (MKL.) CU²

III (MKL-) a1 ¡¢³C (Loc. .-) U²2(++,2C-.) #$ -,1,*R.* yBP, MKL- C (Loc. .-) 

U²2 (++,2C--) #$ -,20*R.*yBP, W* (Loc.
01) C;

(SML) CU²2 (*-*/+3ῌ3) #$$¸^+¹23º»¡mH# ¼%2

65

-,2/*.* yBP     %&()! "(Loc. 0/)  #$' (NW0) * +,(FJM-+2)  -,03*.* yBP, -(Loc. ,2, -2). /01 (SW/) * +,++,3C--*,+++.C-+!  -,0,*.* yBP

1* yBP

2345 6-,.**   78 9:/; <
S-. =>?@AB CDEF (FJM

(Loc. /,)-,3)  .,23*/* yBP, S-/ (R I) =>?@AB

CDEF (FJM-,2)  .,2.*/* yBP, S-0 (R II) =
>?@AB CDEF (FJM-,1)  .,1.*/* yBP,
S-1 =>?@AB

CDEF (FJM-,0)  .,1,*

/* yBP

2345  (Fig. . ; Table ,)6  -<-"

(Loc. +-, ..)  - G HIJKLMN* +,  (GS-FJ-.ῌ +C, FJM-*1, FJM-*-)

Fig. 0. Calendar ages for the middle ejecta of ShinFuji volcano (Tsuya, +302, +31+). *·age datafrom the underlying unit. Hatched area shows
the plausible range of the dated unit.

OP .,+/*.* yBP, -,3/*.* yBP, -,3**/*2345 6 FJM-*1

yBP

FJM-*-  Q R

(Loc. ..) ; STEF5UVWOPX

MNZ[\6 (--"

X

Y

;

23 Cal BC ,,+** oH78 6 -<-" ;G*HIJKLMN YX]^ T

8 HIJKLMN Cal BC ,,2**  Cal_`D >?@A=MN F, =>?@A ab!

BC ,,.** o 23  H8

GS-FJ-.ῌ +C

EF5deef%6 F, =>?

\ (6 \\ HIJKL ¡¢@A X EF (Loc. ++, +/, ,1, -0)  -,1+*.* S ,*c-* cm%H £; \ ;} ;{eTyBP (*,-,C)c.,+,*.* yBP (*,++*2-*---C) YX E

%T6

F (Loc. ,1)  -,.**.* yBP (*,++*2-*.-*C)

23
1 

4 6 

0ῌ- 

1ῌ+ 

g (+322)  9:/hi jk 234 lm*8# ¤ lmH;¥



lmn8

*8

S

2c../ kao#H¦ ;!tH J§¨@©K£H! ªp\eqr%9:/5Sst#\ 5u"( S-+*  S-,,v\6 wx Cal BC -,.** o#\\ Fig. , ; g +322!6 g (+322)

yz%{ Anm  n8 B|YX}*8 ~' (NW++) 5SEF5U%B

{e  *8# *;tX}
eT6  wx  S-/ (R I)  S-0 (RII) =>?@A 234g \23 

78 -c, ka=>?@AMN

hi; 

(eT6   78< «¬­®%W GoDA ; g¯ ,**.! \eT61ῌ, =>?@AMN ° 2345

\e  S-/ =>?@A # BC -,0** 2o (Table ,)6 -<

S-0 =  > ? @ A

NB CDEF (FJM-,.)  -,*3*.* yBP, -(Fig. 0)6 o #  Cal BC -,/** o%{234 S-/S-0 =>?@A#lm*8

{ g (+322)

#

t

H5 t\e(Loc. .*)

S+* =>?@AM~'=>?@AMN* (Os)"(Loc. +1)+,

(FJM+*-)  -,++*/* yBP, ~±²H5³´

T6  *8m  B

(Om) * +, #%  78 w m (Loc. .0)

(Loc. /0)

~±=>?@AMN

(*++*+2C-+)  -,*+*.* yBP, <
S-+- µ'! =>?@AMNBV)%TH(eT6 $'

CDEF (FJM.*/)  -,*1*.* yBP, -<" 5G *8;YX  ;.*) ; S-+-(Loc.

YX}=>?@AMN ¶#=

66

µ¶·¸ ¹º» ; Kmk (FJM-*/)  S-++,,0,*.* yBP,  (Loc. //)S-+2  

~-$L8  P¼
z*)(@ {|}z2 (+,*.C-/)  ,,/,*.* yBP, -.WX< @ +332 ; @ ,***@  

 (Loc. 0.)

S-+2 

L)WX<K

(FJM-+*)  ,,..*.* yBP, S-,,  

 (*,++*2-*.--C, +,*.C-/, FJM.++) ,,-1*.* yBP+,12*.* yBP,  (Loc. /*)S-,,-.- kasT

Kigoshi and Endo, +30- ; @ +311 ; @ +332 ;@ ,***% @ L Q)^K="   (FJM.,*)  ,,,**-$ OsOm .* yBP,  (Loc. -.)P

S-,,  

 (++,3C-,)  ,,,,*.* yBP



 !"

 ! &' FJM.++ ()#$% S-,,

567289:

;<$=

>?)

(@ "A BC2D 89: - <F GF?H

E$ (Yamamoto et al., ,**/)% Loc. 2+ 2D  (SYP+)  -,,.*.* yBP, Loc. +*, 3, 0/(FJM-,/) (

SYP+ "IJKLMNO (SYP+R)  (FJM,*-, FJM,*+, FJM-+3) ( -,,1*+** yBP-,,-*.* yBP,
Loc. /2 F GF?H , 2D  (SYP,)  
(FJM.+3) ( -,*.*/* yBP, Loc. 2

SYP, "IJKLMNO (SYP,R)  -,,) ( -,*-*.* yBP, Loc. 2

 (SYP-) 

D S-+- L -.+-.* ka

 !"#.S:@ L T 8 -.+ ka w:]/sUK=(a)s0% =¡(@  (,***)

Ly " -.+ ka JKastuJK%*+,-./0%1234

(=<X4 ,.2
!8;<.0K,,20*.* yBP, Loc. 3y( Cal BC£¤!")¥JK Os+,.** ¦@ Om¢@ 

y( Cal BC +,-** ¦@ S-+-y(*+7) w:]/x/s Cal BC +,-** ¦@ Kmk
y( Cal BC 2** ¦@ S-+2S-,,

y( Cal BC /** ¦@y( Cal BC -** ¦UK (Fig. 1)% S-,,)q0.( ,JK] ]#<$8@ !( FJM.,*.0K% =

!( S-,,

8§J¨)sXXE! ,,,-*++*yBP @ +322 ]stuJK%(FJM

F G2F?©ª)ῌ6-$2D ~  (@F GF?H - 2

SYP+ 8 Cal BC +,/** ¦@ SYP, 8 Cal BC +,-** ¦@ SYP(FJM-,+) (- 8 Cal BC +,*** ¦@ SYP. 8 Cal BC 11* ¦4^K% =SYP- "IJKLMNO< 2D (1234 5672>)@  -$ (SYP-R)  (FJM,*,) ( ,,22*1*

2D81« ¬­"¤R4®¯)UZ<'yBP, Loc. 1, 0., 0/, .

F GF?H . 2D $] °±;<.0K (Yamamoto et al., ,**/)% X(SYP.)  (FJM-+,, FJM-+-, FJM-++, FJM$@ SYP+ (

4

S-+* ²³.-*) ( ,,//*.* yBP,,/+*.* yBP, Loc. SYP. "IJKLMNO (SYP.R)  
(FJM-+.) ( ,,.3*0* yBP





!"#$

(Table ,)% SYP+  SYP,P)( Os 8@ SYP,  SYPP)( Om 8@ SYP.

Q)( S-+2 8QR-.S-:@ =< T !)(*+7),8U0%
G2 Loc. .0


GoDA

VC)WX<K(FJM.*., FJM.+*) ( /,,.*/* yBP -,,0*.* yBP

 !"#$ (Fig. .)% = !(BYU

Z<)[:\X<$ Q* ] 4^:@ GoDA 6_`"a.0K% bc@ GoDA

 (FJM.*/) ( -,*1*.* yBP

S-+-  !"#.S:@ de*+ (fg-.0K%
1ῌ- ῑ῏ῐῌ῍῎S-+*  S-,,4(@ hijk-.*+ !)lm no"pa$,(dqU0% --rsdK S-+*

8S-+- tuJKUv*+w:]/x/sy.0K% S-+*

Fig. 1. Calendar ages for the younger ejecta of
Shin-Fuji volcano (Tsuya, +302, +31+) between
the S-+* and S-,, scorias. *´age data fromthe underlying unit, ”´age data from the overlying unit. Hatched area shows the plausible
range of the dated unit.

6ºO»'45Ac ^¼7
 67

} (Onw,) &OP (*++*+3C-,) () +,,/*

GoDA    !"#.* yBP, ^ (Loc. /1)   } (Oon) &OP

+$%&'() ,./ ka *+  ,- (FJM.+,) () +,,,*.*yBP, ^ (Loc. ,1) . +322 ; /0 +3301 ( 23'45  # Y 8 Z [ \ ] $ %  (Obc)  8  

GoDA 67 Kmk 89:;< (FJM-*/) ((*,++*2-*.-/C) () 31*.* yBP, "¡$% Obc ) ,.0 ka '=>6

? GoDA 8 S-+-89:;< (FJM.*/) ()@ =ABC -.+ ka:;<:;< (*,++*2-*.-0C) () +*/*.* yBP,

Obc 67^ (Loc. -.) #¢&}

'=> +D (Fig. .) @  GoDA '(Obu) &OP (++,3C-+) () +,+1*.* yBP, i^) -.IJ (,**.) KL (Loc. /+)  S-,.-0 Y8Z[\]$% ,6IJ

E+FG+H

45A GoDA &MN()

OP

+3211 & (FJM.+0) () +,+-*.* yBP, ^Q () ,.2 ka ' (Cal BC 3.*R23*)  ))

(Loc. -*, --) '(} (Fud) &OP (+,*+C- ?= STUVWX+

+,*0-,C) () +,*,*.* yBP  3/*.* yBP, Loc. -+"Y8Z[\]$%&OP (FJM.*-) ()
2 



30*.* yBP, ^ (Loc. -,)2ῌ+  H 

Fud 67)

} (Nis) &OP (*,++,0C-,) () +,*/*.*S-,, Y8Z[\] ^_ ` a bc

yBP, i^ (Loc. .,, .+)  *+} ,£^¤,

e ,-.} Syt ¥¦1 &OP (SKYC-+, +--+C) ()^^d

+3221 dfghiR^jk ilf^ Bm a ?)nopRqrs+,***.* yBP  3**.* yBP '=> Yam () FJM-+/ '= +,/.*.* yBP JAB-§(AD 2**R20/)  tu^C "$%"¡()¨© FJM-,* `()vwU ax+B H'= +,-,*.* yBP J=.ª, ? K

i^ AD +1*1 y

«C + Obc 8 *,++*2-*.-/C  z{bcb|}B ?

?>/n Obu 'AB-§¬ (­6

~|^()}N]] ,

7 Fud l Nis '®+ TX1 } 2ῌ-  

2ῌ,  

23'45FG Cal BC -** ¯ S-,, ^_ (Table

 °Ds>(±^  Cal AD +,***,) ^ (Loc. ,3)  } (Asg) &OP¯ e?>² (Fig. 2) S-,.-, ,(*,+++.C-,) () ,,+,*.* yBP, i^ (Loc. ./)    Y 8 Z [ \ ] $ %  (FTT)  8  9 : ; <yBP, +,/0*2* yBP  d +- C

(FJM.*,) () ,,*/*.* yBP, i^ (Loc. ./)  S-

 ,6IJ +3211 2345FG +.2R+.1 ka,.-+ Y8Z[\]$% ,6IJ +3211 &OP

,Cal AD ,.*R-2* ¯1 ?°´µ (FJM.*+) () +,2/*.* yBP, i^ (Loc. /., /-)Onw, () +,,-*3* yBP  03*3* yBP  d +-C $% ,S-,.-, ; 6IJ +3211 &OP

³'= ?>/n1 ¶} (Kri) () +,,-* (FJM.+., FJM.+-) () +,13*.* yBP  +,03*

3* yBP  d +-C.* yBP, f^ (Loc. +2) } (Aos) 8

+31+1 23 Onw, '=B?X+ 223'=>

B 

9:;< (FJM+*/,

FJM+*.) () +,1/*2* yBP $%1 () +,3**+** yBP, +,02*+,*0³'=S

?



0

0³'=S  ,z{

 ·(B@ S=E+= )

+,/1*1* yBP, f^ (Loc. +,)  Aos &OP Aos () ,,*.*+/* yBP  d +-C(FJM-*+) () +,/1*.* yBP, i^ (Loc. -1,-3)=S  ,z{ +31+1  2345FG(  l0³' ^} (Kan) &OP (+++,C-+, *++,*,C-+)

 +.0 ka ,Cal AD /** ¯1 34¬() +,-,*0* yBP  +,,,*0* yBP,, f^ (Loc. 0,+H Obu ()B +,1/*1* yBP  +,.,*2* yBP 

0+, 0,, 0-, 00) !}gh"Y8Z[\] (Yam)

d +-C

l 

0³'=S  ,z{ +31+1 &OP() FJM-+/ > +,-.*.* yBPR

2345FG +., ka ,Cal AD 22* ¯1 ¬+H+,,.*.* yBP, f^ (Loc. 0*)  + }  (Onw+) &OP (*++*+/-0) () +,,2*.* yBP,
f^ (Loc. /3)

Onw+ 67 ,23'45 5)(+Hb¸* m^d ¹@ ¸)+(H Cal¸9% W¹Xº»Y ¼

68! & %(+322) 1-  rs

! & S&23t7G4ut- c
& QR5vw06x> 78+,c&X)Wey#"& f,pqz97GH:
0,*** VI+ "#   & #O (+3.*)  V)W X)W{& : -,*** {{|&  ,+#O (+3.*, +302, +31+) V)W X)Wm}y#"& ~; TU& z9 !
"# J8+H+# ,+Gyy  )< (+33+)& 9< (+33+)  =4>
> #OV)WX)W:v_06
Fig. 2. Calendar ages for the younger ejecta of
Shin-Fuji volcano (Tsuya, +302, +31+) above theS-,, scoria. *·age data from the underlying
unit, ”·age data from the overlying unit.
Hatched area shows the plausible range of thedated unit.

-& X)W:?/)-V)W:)+I" ,+01-"#  -,-& _ - , A! :f,S  & /@@+ V)W X)W:{V)W X)Wf,- *-& "Z>AD +,*** 

,

(Ken,) 

+322 ; '& +332( &++,*** ./-&

01-"#
7

 

,**+ ; )<& +331( @AS&%`ab+c!BA! 1oM&  /2

 !"#$% &)* !"# Syt  AD +,+**  230456-' (+332)

89#:; AD 3-1, AD

333, AD +,*--, AD +,*2- < !& Ken+  AD 3-1 &Ken,  AD +,*-- :=>A!"#  BC ,+$% <& +33/& +332&(Ken+)

 -,-  FudNis  Cal AD

+,

1A!

?@#
D!:

22 m #OV)WX)WZ  G& V)W~C ¡¢!"#z "&$% <& ,**+(AD> #OV)WX)W

{: -,*** {{{| H&

{H:f,E£-"# ¤+I& - ¥F*-"¦G& !_G§H-"#
8  $% (+30., +311) & #OV)WX)W{Hf,I¨-"¦ s& V)Wijkl
JKJH-"-& #O + QR0

EF ! :;F7GHI& JK0

1-"#  BCS&7G& V)Wijkl

ALM  ! "N9ῌD!

 Cal BC 2,*** .§H-

:"#

+

+ 

&

¥F*>



Cal BC +2,*** ,,Cal BC+/,*** .!*H& $% (+30., +311) QRK3ῌ ῍῎

L@0©ª-"# (+322) BCS&«"¬;A! & $% (+30.,

QR0BCS&TU'-(> & #OV)#O (+302, +31+)& $% (+30., +311) P%+311) ­M- 7#O (+302, +31+) X)WeW,X)WYZ[+*\]^_$%`ab+c!+d(  Cal BC +2,*** .& X)We  Cal BC +/,*** ,Cal BC 0,***.& X)W:f, Cal BC -,0** ,{+:f,6 Cal BC 2,*** ., A1o-q )Wn0Q

& )! N "6¤ "h¥®¯°1o

Cal BCJ ±!"#+#  & #Oe  +,1** .&X)WX-.+/:f, Cal BC

H Cal BC 0,*** .E£-"#  Cal BC -,0**+,/** ,Cal BC -** .& X)WX-D!

., q

S-/S-0 :{& ²O'A+

:f, Cal BC -** .gh +   & $% (+30.,h¥®¯°0³I & ´P+:f,

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 (+311) !hHnd%s  ¡¢£ +.C (S ,, ,11ῌ,12.
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Kigoshi, K. and Endo, K. (+30-) Gakushuin natural radiocarbon measurement II. Radiocarbon, /, +*3ῌ++1.
¢£ (+332) ¤3S ¤¥~i  .- -,-ῌ-.1.
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,3-ῌ-*2 --1ῌ-/*.
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R1 no. ,/+, +ῌ.3.
Stuiver, M., Reimer, P. J., Bard, E., et al. (+332) INTCAL
32 Radiocarbon Age Calibration, ,.,***ῌ* cal BP. Radiocarbon, .*, +*.+ῌ+*2-.
ST\U  89 :  V]^_  NEF  234(+332) ?;WK`Ya@b#$ABC?cde +.C ,# NEFX f?K 3 0gYY
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OG klm : n"op.q$rs .-ῌ.2.
5t.u^_D`vwaxyz{2bU(+33+) ".|Z}}~Sc : deK*r  -0 ,2+ῌ,30.
Talma, A. S. and Vogel, J. C. (+33-) A simpliﬁed approachto calibrating +.C dates. Radiocarbon, -/, -+1ῌ-,,.
NEF (+33+) f G 3qUT}}a".|Z( g  -0 ,03ῌ,2*.

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y +2 .+3ῌ../.
ar (+302)  +z / {( + + B| +MR ,. p.
ar (+31+)   +  : }MRi ¡ +,1 p.
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Yamamoto, T., Takada, A., Ishizuka, Y., Miyaji, N. andTajima, Y. (,**/) Basaltic pyroclastic ﬂows of Fuji
volcano, Japan : characteristics of the deposits and their
origin. Bull. Volcanol. (in press)
NEF (+313) ³UTJ´QLµ¶· ¸-"#0 ¹º ° + +--ῌ+.,.
Yamazaki, H. (+33,) Tectonics of a plate collision along
the northern margin of Izu Peninsula, central Japan.
Bull. Geol. Surv. Japan, .-, 0*-ῌ0/1.
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