!"#$%&'() *+,--*).)+/)01'%")+-**) Perito Moreno - PowerPoint PPT Presentation

!"#$%&'() *+,--*).)+/)01'%")+-**)

Perito Moreno glacier, Argentina southamericatravelling.wordpress.com

!"#$%#234)$5#46&()7'#%4#6&)4&893':() W. W. Norton. Adapted from Hamblin and Christiansen, 1998 W. W. Norton. After Flint, 1971

;$&)(1'&#7%46)$&48&'(<)=3'85)0>&'%$#) W. W. Norton. After Flint, 1971

?"&%(83$&4&)?"@A%#")B#:&()#47) C&6#D337() 6&3"36E,%(@,&7@)

C&6#85&'%@>)F6%#48)6'3@47)("385G)

Cirque glacier J. Alean

Valley glacier H'#4I)J3(&K)!"#$%&'L)=M)

!"#$%&'$"()*)%+),%-.,,$% !'38I%46&')&8)#",L) !"#$%&'("#)"*+,(%'-+

H'#4I)J3(&K)!"#$%&'L)=M)

Measured glacier velocities Site Surface velocity (m/yr) S. Cascades 20 Antarctica 32 Greenland 50 Alps 100 Saskatchewan, Canadian Rockies 120 SE Alaska 500 Ansterdalsbreen, Norway (icefall) 2000 !

;$&)(1'&#7%46)$&48&'(<)=3'85)0>&'%$#) W. W. Norton. After Flint, 1971

H3N)!"#$%&'L)=M)FC)J)O#>P'&EG)

Q(1#""#8#)R#""&E)

! 3'(>S':)

TEU#VS'W@')

!"&4)X3&) FB%47E)T":%4(YZ#4834G)

R#""&)7&)['7&(#)

“Glacial buzzsaw” hypothesis \'3&$:&')])^&4834)F*__-G)

Lateral � Moraines � Medial � Moraines �

Z&'>%4#")>3'#%4&()%4)85&)&#(8&'4)Q,`,) W. W. Norton. Adapted from Tarbuck and Lutgens, 1996 W. W. Norton. Adapted from Tarbuck and Lutgens, 1996

!'38I%46&')&8)#",L) !"#$%&'("#)"*+,(%'-+ ^'@>"%4()

a#>&)O%"") 6&3"36E,9%($,&7@)

a&b"&)B#:&(L)`%P&'%#) B#47(#8)/)%>#6&)

a&b"&)B#:&()4&#')C8,)X33:L)=M)

Esker in NW Territory, Canada X,)J,)=3'85'@1L) \3%(&)`8#8&)

Striations Stephen Marshak Steve Marshak

Striations & “chatter marks” Steve Marshak

Cirque (with cirque glacier) J. Alean

Roche moutonnée (c) Martin G. Miller Martin G. Miller