Sur une brèche nummulitique, à faciès Wildflysch, de l'Ile d'Elbe

(1)

Article

Reference

Sur une brèche nummulitique, à faciès Wildflysch, de l'Ile d'Elbe

COLLET, Léon William

COLLET, Léon William. Sur une brèche nummulitique, à faciès Wildflysch, de l'Ile d'Elbe.

Compte rendu des séances de la Société de physique et d'histoire naturelle de Genève, 1934, vol. 51, no. 2, p. 95-98

DOI : 10.5169/SEALS-741501

Available at:

http://archive-ouverte.unige.ch/unige:137286

Disclaimer: layout of this document may differ from the published version.

1 / 1

(2)

SDVVDQW ^j O(RFqQH /HV &RXFKHV URXJHV ^GHV 3UpDOSHV PpGLDQHV VRQW JpQpUDOHPHQW DWWULEXpHV DX &UpWDFp VXSpULHXU /H FDOFDLUH JULV GX &ROOH 5HFLVR VXUPRQWH ^OH %LDQFRQH HW ^OHVFDOFDLUHV IRQFpV j 5DGLRODLUHV HW &DOSLRQHOOHV GpFULWV SOXV

KDXW

&RXSH

LO SHXW

^rWUH FUpWDFp &RPPH

GDXWUH SDUW LO

^HVW^WUqV ^VHPEDEOH SDU ^VD

PLFURIDXQH

DX &UpWDFp VXSpULHXU ^GH 9HUQDQG %UDVVHV HQ

SDUWLFXOLHU _SDU

^VHV ^\O^FOPLVF06

LO _\

D ^GHV SRVVLELOLWpV

SRXU TXLO VRLW

GX PrPH kJH 6RQ

DIILQLWp

DYHF OHV FDOFDLUHV GDQLHQV S\UpQpHQV QH

IHUDLW

_TXH UHQIRUFHU FHWWH K\SRWKqVH ^1RXV HQYL VDJHRQV GRQF FRPPH FUpWDFp VXSpULHXU ^OH ^FDOFDLUH GX &ROOH 5HFLVR

MXVTXj

^FH

TXRQ

VLJQDOH XQ FDOFDLUH ^DQFLHQ PLHX[ GDWp SRVVpGDQW ^VHV FDUDFWqUHV PLFURIDXQLVWLTXHV ^&HV ^FDOFDLUHV ^VH

UHWURXYHQW

^j 5LPHVVD j

O:

^GH

3RUWRIHUUDLR

^DYHF ^OD ^PrPH IDXQH PLFURVFRSLTXH

'HSXLV _TXH *LJQRX[ ^HW 0RUHW HQYLVDJHQW OD SRVVLELOLWp

GXQ

HQUDFLQHPHQW ^GHV 3UpDOSHV 0pGLDQHV GDQV ^OH JpRV\QFOLQDO

DOSLQ

^OH &UpWDFp VXSpULHXU ^GH

O,OH G(OEH

DSSDUWHQDQW ^j XQH VpULH SHQQLTXH SUpVHQWH ^GH FH

IDLW XQ FHUWDLQ LQWpUrW

/DqRUDvRLUH ^GH *HRORJLH ^GHOWOQLFHUVLvH^GH ^*HQqHH

/pRQ: &ROOHW

²

L6DU XQH %UqFLH ªZQLP.OLOLJZH ^j DFWHV 73L0KVFL ^{GH ==H} F=L"==!H

%

/RWWL

^GDQV VRQ UHPDUTXDEOH PpPRLUH VXU

O,OH G(OEH DWWULEXD

DX

1XPPXOLWLTXH

^OHV

UDGLRODULWHV

HWOHV FDOFDLUHV EODQFV URVHV RX YHUWV ^j

JUDLQ

ILQ

TXL

^OHV ^UHFRXYUHQW

(Q

^* 6WHLQPDQQ HW ¹

7LOPDQQ D\DQW

^GpFRXYHUW ^GHV

&D=QRQH==D D=SLUHD

/RU

GDQV OHV FDOFDLUHV VXV HW VRXVMDFHQWV

L

0 *LJQRX[ HW /

0RUHW

^/D ^]RQH^GD5ULDQSRQQQDLV^HW^OHV^UDFLQHV

GHV QDSSHV SUpDOSLQHV VDHRLVLHQQHV & ^3A $FDGpPLH GHV 6FLHQFHV

W

S 3DULV

%

/RWWL

^&DUWD ^JHRORJLFD ^GpOLD VROD G&OqD 5 8IwLFLR

*HRORJLFR 5RPD

%

/RWWL

'HVFUL]LRQH _JHRORJLFD GHOOVROD ^G="qD ^0HPRULH GHVFULW WLYH GpOLD &DUWD _JHRORJLFD

G,WDOLD

5RPD

6DQGUR

)RUHVL

^/&OqD LOODVWUDWD &KDSLWUH &HQQL JHRORJLF ^H PLQHURODJLFL SDU ⁵ /R|L 3RUWRIHUUDLR

* 6WHLQPDQQ^S ^WHqHU 7wHHQD VjI]H ^GHV 2LHUwWUD ^LP ^$SHQQLQ

*HRORJLVFKH 5XQGVFKDX SS

& % 6RF SK\V ^*HQqYH 9RO

(3)

6e$1&( '8 -8,1

DX[

UDGLRODULWHV G(OEH

^FHV

IRUPDWLRQV IXUHQW

DVVLPLOpHV _DX

%LDQFRQH _RX j OD 0DMROLFD

(Q 3

7HUPLHU

HW ⁽

0DXU\

IDLVDLHQW OD PrPH FRQVWD

WDWLRQ

^GDQV ^GHV FDOFDLUHV VHPEODEOHV GH OD ^&RUVH

%

/RWWL ^DYDLW

FHSHQGDQW

WURXYp

^GHV ^FDOFDLUHV

QXPPXOLWLTXHV

LQGLVFXWDEOHV _VXU OH ERUG 6XG ^GH

O,OH

^G(OEH ^&HW DXWHXU FLWH HQ HIIHW 79LLZQZLLOLZD V=UWD=D

G2UE

HW L9 F

ZUHJWDZ

^'HVK GDQV OHV FDOFDLUHV GH OD

3XQWD

)HWRYDLD DX 6XG GX

0RQWH

&DSDQQH SXLV ⁷⁹ %WDULWHHQVZ GDQV OHV FDOFDLUHV TXL ^VH

WURXYHQW

VRXV

OD

FDVD

%XUHOOL

VXU OD

ULYH

GURLWH GX

UDYLQ

GDQV OHTXHO SDVVH ^OH FKHPLQ

PXOHWLHU

_{TXL GX} &ROOH 5HFLVR

FRQGXLW

DX *ROIR GpOLD /DFRQD

- &DGLVFK HQ

GLW QDYRLU

_SDV

WURXYp

FH GHUQLHU JLVHPHQW

'XUDQW

XQH H[FXUVLRQ GX

/DERUDWRLUH

^GH 0LQpUDORJLH HW ^GH 3pWURJUDSKLH ^GH

O8QLYHUVLWp

^GH %kOH HQ QRXV DYRQV

UHWURXYp

OH JLVHPHQW ^GH

OD

^&DVD

%XUHOOL

HW GpFRXYHUW ^GH FXULHXVHV EUqFKHV

QXPPXOLWLTXHV

DX ERUG GH OD _PHU j

O:

^GH ^OD 6SLDJJLD

*UDQGH GDQV OH *ROIR GpOLD /DFRQD _{1RXV DYRQV} FRPSOpWp QRV REVHUYDWLRQV GDQV XQ GHX[LqPH YR\DJH

$

ODQJOH : ^GH OD 6SLDJJLD *UDQGH DX SLHG ^GH OD IDODLVH RX

WURXYH

GDERUG ^GHV FDOFDLUHV DUJLOHX[ VFKLVWHX[ ^GX

W\SH

^GH FHX[ GX &ROOH 5HFLVR DYHF

OHQWLOOHV

FDOFDLUHV GXHV j

OpWLUHPHQW

GH EDQFV _TXH &ROOHW _{HW 3DUpMDV}

YLHQQHQW GDWWULEXHU

DX

&UpWDFp VXSpULHXU &HWWH

IRUPDWLRQ

_VXSSRUWH ^GHV

WXIV

DYHF GHV JUqV HW FRQJORPpUDWV ILQV EODQFV ^j

OH[WpULHXU

HW

GXQ EUXQ MDXQkWUH

^j

OLQWpULHXU

6L

ORQ VXLW

^OH ERUG GH

OD

_PHU YHUV

O:

^j

SDUWLU

^GH ^OD ^IDODLVH

GRQW LO ^YLHQW

GrWUH TXHVWLRQ RQ QH WDUGH _{SDV j} UHQFRQWUHU ^GHV VHUSHQWLQHV EUqFKLIRUPHV SXLV ^GHV JDEEURV WUqV ^© VFKOLHULJ ^ª SOXV RX PRLQV VDXVVXULWLVpV 4XHOTXHV VHUSHQWLQHV

IRQW

VXLWH HW RQ

DUULYH

^{j GHV} EUqFKHV

QXPPXOLWLTXHV

/HV pOpPHQWV GH FHV EUqFKHV VRQW HQ PDMHXUH

SDUWLH

^GHV ^EORFV

3

7HUPLHU

HW (

0DXU\

^,9RLWSH0HV R VHURDKRQV JHR=RJLLMUZHV GDQV ID &RLVH RULHUD]D=H * 5 $FDGpPLH GHV 6FLHQFHV 3DULV W

- &DGLVFK =XU *HR=RJWH GHU ^UHVH= wqD 9HUKDQGOXQJHQ GHU 1DWXUIRUVFKHQGHQ *HVHOOVFKDIW LQ %DVHO %G

;/

SS

/pRQ:

&ROOHW

^HW ^(G

3DUpMDV

^pIDU ID SUHVHQFH ^GH &UHWRFH VXSHULHDU GDQV XQH L9DSSH D=SLQH GH ^==H G H & 5 ^6pDQFHV ^GH OD 6RFLpWp ^GH 3K\VLTXH HW G+LVWRLUH QDWXUHOOH GH *HQqYH

(4)

RX ^GHV IUDJPHQWV ^GH ^URFKHV YHUWHV TXL

IHURQW SURFKDLQHPHQW WRXW

FRPPH ^OHV URFKHV ^GH

OD 3XQWD

GpOLD &RQWHVVD

OREMHW

GXQH

SXEOLFDWLRQ

^GpWDLOOpH ^GH ^OD

SDUW

^GH ^QRWUH ^FROOqJXH ^HW DPL 0 OH SURIHVVHXU

0D[

5KHLQKDUG 'HV

FDLOORX[

^GH &UpWDFp VXSpULHXU VRQW PRLQV IUpTXHQWV 8QH _FRXSH PLFURVFRSLTXH

GXQ

GH _FHV

FDLOORX[

^GH &UpWDFp VXSpULHXU UHQIHUPH XQ

SHWLW IUDJPHQW

GH VHUSHQWLQH

GRQW

OD GLPHQVLRQ _QH _QRXV DXWRULVH _SDV j

WLUHU

^GHV FRQFOXVLRQV /H FLPHQW GH FHV EUqFKHV HVW FDOFDLUH HW HVW SOHLQ ^GH QXPPXOLWHV &HWWH URFKH HVW

GXQ

HIIHW VXSHUEH pOpPHQWV YHUWV HW FLPHQW EODQF /HV pOpPHQWV GH FHV EUqFKHV

²

^URFKHV YHUWHV HW FDOFDLUHV GX &UpWDFp VXSpULHXU

² PRQWUHQW

OD

GpPROLWLRQ

GXQH IDODLVH

GRQW

^OHV ^URFKHV VRQW FDUDFWpULVWLTXHV GX JpRV\QFOLQDO DOSLQ 1RXV DYRQV SHXWrWUH GDQV OHV pOpPHQWV GH FHV EUqFKHV OHV

SURGXLWV

^GH

OD GpPROLWLRQ

GH OD

SDUWLH IURQWDOH

^GXQH QDSSH DOSLQH

YHQDQW

^GH

O(VW

^HW

GRQW

^OHV GHUQLHUV UHVWHV j

O:

^VHUDLHQW UHSUpVHQWpV

SDU

^OHV VHUSHQWLQHV ^GH OD

3XQWD

GpOLD &RQWHVVD

/D

JUDQGH EDQGH

GRSKLROLWKHV TXL

^WUDYHUVH

O,OH G(OEH

^GH

3RUWRIHUUDLR

DX

*ROIR 6WHOOD

DSSDUWLHQGUDLW

^j ^FHW pOpPHQW WHFWRQLTXH ^1RXV ^QH SRXYRQV FHSHQGDQW TXH SRVHU ^FH SUREOqPH

GRQW

OD VROXWLRQ GHPDQGH GHV OHYpV GpWDLOOpV

/kJH ^7HV ^qUqF/HV ^HVW

LPSRUWDQW

^HW ^QRXV SRXYRQV ^OH

GpWHUPLQHU

DX PR\HQ ^GHV 1XPPXOLWHV 8QH VHXOH HVSqFH HVW DERQGDPPHQW UHSUpVHQWpH FHVW ⁷⁹ 7WWFDVDUHDV 'HIU GX ^/UHWpI7HUH WUHpULHUHU

/D

^GLVWDQFH HQWUH OHV FDOFDLUHV

QXPPXOLWLTXHV

^GH ^OD ^&DVD

%XUHOOL

HW OHV EUqFKHV

QpWDQW

_TXH ^GH

NP

QRXV QRXVVRPPHV GHPDQGp VL QRXV QH QRXV

WURXYLRQV

SDV HQ SUpVHQFH ^GH GHX[

IDFLqV GH PrPH _kJH 8QH UpYLVLRQ GH OD

GpWHUPLQDWLRQ

^GHV

1XPPXOLWHV

VLJQDOpHV

SDU

^%

/RWWL

^GDQV ^OH JLVHPHQW ^GH

OD

^&DVD

%XUHOOL

_VLPSRVDLW GRQF &HW

DXWHXU QDYDLW LQGLTXp

TXXQH HVSqFH ⁷⁹ 7UHDPIHHUHVLV 1RXVQDYRQV pJDOHPHQW

WURXYp TXXQH

VHXOH HVSqFH ^7D ^PrPH JUHH 7DUHV ^7HV 7YqF/HV VRLW ⁷⁹ ^7DFDVDUHZV 'HIU

/H

FLPHQW

^GH OD EUqFKH UHQIHUPH ^j ^{F{Wp GHV}

1XPPXOLWHV

^GHV 'LVFRF\FOLQHV ^GHV 5RWDOLGpHV j WHVW pSDLV ^GHV 0pOREpVLHV

SDUPL

OHVTXHOOHV 0 _3DUpMDV D UHFRQQX MUF$DHR7KWR/DPUH7ªP UHDPPUH77KFUHP *XPE HW ^GHV FRTXLOOHV ^GH %UDFKLRSRGHV

/H FDOFDLUH GH

OD

&DVD

%XUHOOL FRQWLHQW

^j F{Wp ^GH ⁷⁹ 7UHFDVDUHUHV

(5)

6e$1&( '8 -8,1

=L]=FD *XPE /HV 0pOREpVLHV TXL SUHQQHQW XQH

SDUW LPSRUWDQWH

j OD

FRQVWLWXWLRQ

^GH FH FDOFDLUH VRQW UHSUpVHQWpHV

SDU

^$UFbDHR==

LÆR=KDZLQL72 QXPPD=L]=FXP *XPE 7UqV VXERUGRQQpV RQ

YRLW

HQFRUH ^GHV IUDJPHQWV ^GH %U\R]RDLUHV ^HW ^GHV 7H[WXODLUHV

/X

UpVXPp

OD

IDXQH GHV FDOFDLUHV GH OD &DVD

%XUHOOL

HVW

OD

PrPH TXH FHOOH ^GHV EUqFKHV 1RXV DYRQV GRQF ELHQ GHX[ IDFLqV GH PrPH kJH

/HV EUqFKHV

QXPPXOLWLTXHV

UHSUpVHQWHQW XQ

YUDL :LOGIO\VFK

IDFLqV GH

GpPROLWLRQ

GXQH IDODLVH GH URFKHV YHUWHV GDQV OD PHU GX

/XWpWLHQ LQIpULHXU

*HQqHH /D RUDIRLUH ^GH *HRORJLH ^GH U=-QIHHUVLOH

/pRQ: &ROOHW HW ^- %XIIOH

²

^/H ,UFPVSRG ^GHV ^D==ZRLRZV HX VXVSHXV=RX GDXV ^=HV HDXD GH =$UHH j *HUHqHH HX

1RXV SRVVpGLRQV VXU ^OH

WUDQVSRUW

^GHV ^DOOXYLRQV ^{GDQV OHV} HDX[

GH

O$UYH

^j *HQqYH GHX[ pWXGHV

SRUWDQW

FKDFXQH VXU XQH ^DQQpH GREVHUYDWLRQV

/D

SUHPLqUH UHPRQWH ^j ^HW OD VHFRQGH

j

/DXWHXU

^GH OD SUHPLqUH %DHII QpJOLJHD TXHOTXH _SHX

OD GpWHUPLQDWLRQ

GX

GpELW

^GH

O$UYH

^6HV UpVXOWDWV VRQW GH FH

IDLW

HQWDFKpV GHUUHXUV

/XQ

^GH QRXV /pRQ

:

&ROOHW

IXW

^DPHQp ^j

FRUULJHU

^OHV ^{GRQQpHV GH}%DHII HQ VXUODEDVH GHV VWDWLVWLTXHV

GX

6HUYLFH IpGpUDO GHV (DX[ 0DOJUp ^FHV FRUUHFWLRQV ^OHVUpVXOWDWV DLQVL REWHQXV _QH

SRXYDLHQW

rWUH FRPSDUpV ^j OpWXGH EHDXFRXS SOXV GpWDLOOpH ^HIIHFWXpH HQ

SDU

^&ROOHW HW %RLVVLHU

'X

SRLQW

^GH ^YXH

K\GURJUDSKLTXH

^OH

GpELW

_PR\HQ ^GH ODQQpH QH

IXW

TXH ^GH PAVHF DORUV

TXLO ^pWDLW

^GH ^PAVHF

HQ /H

GpELW

_PR\HQ DQQXHO GH OD SpULRGH

pWDQW

GH PAVHF ^OHV UpVXOWDWV REWHQXV

SRXU

^OH

WUDQVSRUW

^GHV

DOOXYLRQV

HQ GHYDLHQW rWUH HQYLVDJpV FRPPH

pWDQW

DX

%RQp

%DHII

^/HV ^{HDQD GH} ^=$UDH ^7KqVH ^GH ^GRFWRUDW ^GH

^O8QLYHU

VLWp GH *HQqYH

/ :

&ROOHW

^HW ⁵

%RLVVLHU

^/H ,UDQVSRUW ^GHV ^D==DHWRUHV ^GDQV

=$UDH HQ & 5 6RF GH SK\VLTXH ^HW GKLVW^S^S QDW GH *HQqYH YRO SS

Sur une brèche nummulitique, à faciès Wildflysch, de l&#039;Ile d&#039;Elbe

Article

Reference