Hirnantian Glaciation (Van Staden et al. 2010). The later authors, decided based on a non Neoproterozoic age of the glacial diamictites, as was traditionally sup-.
! " #$
! " #$%& $ '
(!&###!)*!& !&&!+ %#!(!&,-%!&!,.0%&12%%&&,,*,#!&,*#& #& 3 4 %*,##!!%&5%,&1 ,*!& !6,7!,#!!%&!8-%& )*!& !& -!,69&:-0%!* (!&###!)*!& !& %*,##!!%&5%,&1 ,*!& !6,7!,#!!%&!8-%& )*!& !& -!, ' &!+ %#!(!&,-%!&!,.0%&12%%&!,#!!%-.#!!%*&&$!!&1!;7% 3$47!,!1?@A$*!)!,) B=C (%#!)*!& !& -!,
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
4 #&%*&&!# ,E! &*%! !& 0 ,E! )%%! 7, 6! 3 @@C @
4 &*--!&,!# ,E !%#!>. #! , , , ,E! F!&, # ,E # , ,E! (!1 &, ,> %,% , !56 ,E! (%% 6*, #%*7!,!# FG!& 1 7!7 # 6!, 3 @@=4 E! 6!> %*!,& 6,,! & 71 &,>R!&, 3!*-- =A-!# &#&,!& %07- %(!5 #F ,# &#%E!&!,!&%,1%> ,*#,6!%*!,&07,E!&,> ,E!&, #&> !-#- ,E! F!&,! &*%! 0 ,E! !&,! *,%6& E! )%%! 7, %,& *#, %E> 0&&&T&7!0,E!7G!&7!%E&6!%!&0 ! "# ! #%,(! 0 * -! 3 !%E! @@ !%E! @@C4#,E!&G! #
! #7, 1 * &*%%!&> && 3&!! #&!- # $, @@'4 FE! ,E!& G! $ E(! &,,-6E% (*! 3&!! *,2!9 4,,6%6!#&> !-#& !(-!0,E!)%%! 7, # &",! *-!&,&*66,!#1 1!(#> !%! !%!,1,E!*,F& %!,!# F,E ,E! > 6&,; 7, ,E! J!, 1&,!7 37& @ !&,&E!# !(-! E! %!%, %!, 0 ,E! )%%! 7, E& *!56!%,!# %&!D*!%!& F,E ,E! $(&I G# &,,-6E1 N*,! # "7& 3 @@'4 %!,!# ,E! #*F *6 G! J ,> #! 3 @ @4 ## F,E ,E! )%%! 7, F,E,E! , ,!6E!& 7, ,E! &#& #
&&-!# , ,E! !7! $!7! 3B@@ 7 ,E%G4 #!%, %!,F,E,E!*# 7,&F!& F,E ,E! 7&, 0 ,E! $*, %! $!7! 3=@@ 7 ,E%G4 ,!!&,-1 ,E! *# 7, & 1
A@ 7 ,E%G 0% E! !7! $!7! !> &!7!& 6!!(7!,1 # %E-%1 ,E! )%%! 7, *, & ,E%G!&& & 7! -!!7!, !,F!! ,E!7 ,E F,E ,E! *# 7,N*,!# "7&3 @@'4!56!#,E!#0> 0!!%!&,E%G!&�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
%E-!*&4&#%*7!,!# ,%,% 3)#&EF
Geología, Presente y Futuro
Sesión Técnica 1 Estratigrafía
Página 99
! " #$
=B 4 # *&, 3!F # $% 7
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
