Table 1-1. Correlation Chart for Model Stratigraphy

Stratigraphic Unit

Abbreviationa

 RHHb
Geologic
Framework
Model Unit		 Rock
Properties
Model Unit		 Mineralogic
Model Unit

Group

Formation

Member

Zone

Subzone

  
  Alluvium and Colluvium

Qal, Qc

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Alluvium

 Not modeled Sequence 22
(Layer 26)
Alluvium–
Tpc_un
               
Timber Mountain Group

Tm

 Post-Tiva
  Rainier Mesa Tuff

Tmr
Paintbrush Group

Tp
    Post-tuff unit "x" bedded tuff

Tpbt6
    Tuff unit "x"c

Tpki (informal)
    Pre-tuff unit "x" bedded tuff

Tpbt5
  Tiva Canyon Tuff

Tpc
    Crystal-Rich Member

Tpcr
      Vitric zone

Tpcrv
        Nonwelded subzone

Tpcrv3
        Moderately welded subzone

Tpcrv2
        Densely welded subzone

Tpcrv1
      Nonlithophysal subzone

Tpcrn
        Subvitrophyre transition subzone

Tpcrn4
        Pumice-poor subzone

Tpcrn3
        Mixed pumice subzone

Tpcrn2
        Crystal transition subzone

Tpcrn1
      Lithophysal zone

Tpcrl
        Crystal transition subzone

Tpcrl1
    Crystal-Poor Member

Tpcp
Tpcp
      Upper lithophysal zone

Tpcpul
        Spherulite-rich subzone

Tpcpul1
      Middle nonlithophysal zone

Tpcpmn
        Upper subzone

Tpcpmn3
        Lithophysal subzone

Tpcpmn2
        Lower subzone

Tpcpmn1
      Lower lithophysal zone

Tpcpll
        Hackly-fractured subzone

Tpcpllh
      Lower nonlithophysal zone

Tpcpln
        Hackly subzone

Tpcplnh
           
        Columnar subzone

Tpcplnc

TpcLD
      Vitric zone

Tpcpv

    
        Densely welded subzone

Tpcpv3

Tpcpv3

 Sequence 21
(Layer 25)
Tpcpv3–Tpcpv2
        Moderately welded subzone

Tpcpv2

Tpcpv2
        Nonwelded subzone

Tpcpv1

Tpcpv1

PTn

Sequence 20
(Layer 24)
Tpcpv1–Tptrv2

    Pre-Tiva Canyon bedded tuff

Tpbt4

Tpbt4
  Yucca Mountain Tuff

Tpy

Yucca
    Pre-Yucca Mountain bedded tuff

Tpbt3

Tpbt3_dcd
  Pah Canyon Tuff

Tpp

Pah
    Pre-Pah Canyon bedded tuff

Tpbt2

Tpbt2
  Topopah Spring Tuff

Tpt

  
    Crystal-Rich Member

Tptr

  
      Vitric zone

Tptrv

  
        Nonwelded subzone

Tptrv3

Tptrv3
        Moderately welded subzone

Tptrv2

Tptrv2

 TSw
        Densely welded subzone
Tptrv1
Tptrv1








Tptrn

Sequence 19
(Layer 23)
Tptrv1
      Nonlithophysal zone

Tptrn

Sequence 18
(Layer 22)
Tptrn–Tptf
        Dense subzone

Tptrn3
        Vapor-phase corroded subzone

Tptrn2
        Crystal transition subzone

Tptrn1
      Lithophysal zone

Tptrl

  
        Crystal transition subzone

Tptrl1

Tptrl
    Crystal-Poor Member

Tptp

  
      Lithic-rich zone

Tptpf or Tptrf

Tptf
      Upper lithophysal zone

Tptpul

Tptpul

Sequence 17
(Layer 21)
Tptpul
             
RHH

RHHtop
      Middle nonlithophysal zone

Tptpmn

 Sequence 16
(Layer 20)
Tptpmn
        Nonlithophysal subzone

Tptpmn3
        Lithophysal bearing subzone

Tptpmn2
        Nonlithophysal subzone

Tptpmn1

Tptpmn
      Lower lithophysal zone

Tptpll

Tptpll

 Sequence 15
(Layer 19)
Tptpll
      Lower nonlithophysal zone

Tptpln

Tptpln

Sequence 14
(Layer 18)
Tptpln
      Vitric zone

Tptpv

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 		    
        Densely welded subzone

Tptpv3

Tptpv3

 Sequence 13f
(Layers 16 & 17)
Tptpv3–Tptpv2
        Moderately welded subzone

Tptpv2

Tptpv2
        Nonwelded subzone

Tptpv1

Tptpv1

 CHn Sequence 12
(Layer 15)
Tptpv1–Tpbt1
    Pre-Topopah Spring bedded tuff

Tpbt1

Tpbt1
  Calico Hills Formation

Ta

Calico

 Sequence 11g Tac
(Layers 11–14)
    Bedded tuff

Tacbt

Calicobt

Sequence 10
(Layer 10)
Tacbt
Crater Flat Group

Tc

      
  Prow Pass Tuff

Tcp

      
      Prow Pass Tuff upper vitric nonwelded zone

(Tcpuv)e

Prowuv

 Tcp Sequence 9
(Layer 9)
Tcpuv
      Prow Pass Tuff upper crystalline nonwelded zone

(Tcpuc)e

Prowuc

 Sequence 8
(Layer 8)
Tcpuc–Tcplc
      Prow Pass Tuff moderately-densely welded zone

(Tcpmd)e

Prowmd
      Prow Pass Tuff lower crystalline nonwelded zone

(Tcplc)e

Prowlc
      Prow Pass Tuff lower vitric nonwelded zone

(Tcplv)e

Prowlv

Sequence 7
(Layer 7)
Tcplv–Tcbuv
    Pre-Prow Pass Tuff bedded tuff

(Tcpbt) e

Prowbt
  Bullfrog Tuff

Tcb

   Not modeled
      Bullfrog Tuff upper vitric nonwelded zone

(Tcbuv)e

Bullfroguv
      Bullfrog Tuff upper crystalline nonwelded zone

(Tcbuc)e

Bullfroguc

Sequence 6
(Layer 6)
Tcbuc–Tcblc
      Bullfrog Tuff welded zone

(Tcbmd)e

Bullfrogmd
      Bullfrog Tuff lower crystalline nonwelded zone

(Tcblc)e

Bullfroglc
      Bullfrog Tuff lower vitric nonwelded zone

(Tcblv)e

Bullfroglv

 Sequence 5
(Layer 5)
Tcblv–Tctuv
    Pre-Bullfrog Tuff bedded tuff

(Tcbbt) e

Bullfrogbt

  Tram Tuff  

Tct

  
      Tram Tuff upper vitric nonwelded zone

(Tctuv)e

Tramuv
      Tram Tuff upper crystalline nonwelded zone

(Tctuc)e

Tramuc

Sequence 4
(Layer 4)
Tctuc–Tctlc
      Tram Tuff moderately-densely welded zone

(Tctmd)e

Trammd
      Tram Tuff lower crystalline nonwelded zone

(Tctlc)e

Tramlc
      Tram Tuff lower vitric nonwelded zone

(Tctlv) e

Tramlv

 Sequence 3
(Layer 3)
Tctlv–Tctbt
    Pre-Tram Tuff bedded tuff

(Tctbt) e

Trambt
    Lava and flow breccia (informal)

Tll

Tund

 Sequence 2
(Layer 2)
Tund
    Bedded tuff

Tllbt
  Lithic Ridge Tuff

Tr
    Bedded tuff

Tlrbt
    Lava and flow breccia (informal)

Tll2
    Bedded tuff

Tllbt
    Lava and flow breccia (informal)

Tll3
    Bedded tuff

Tll3bt
    Older tuffs (informal)

Tt
      Unit a (informal)

Tta
      Unit b (informal)

Ttb
      Unit c (informal)

Ttc
    Sedimentary rocks and calcified tuff (informal)

Tca
    Tuff of Yucca Flat (informal)

Tyf
Pre-Tertiary sedimentary rock  

Paleozoic

 Sequence 1
(Layer 1)
Paleozoich
  Lone Mountain Dolomite

Slm
  Roberts Mountain Formation

Srm
                   
aSource: CRWMS M&O 2000a.
bSource: CRWMS M&O 1997b, pp. 43–50; RHH = Repository Host Horizon
cCorrelated with the rhyolite of Comb Peak (Buesch et al. 1996, Table 2).
dIncludes rhyolite of Delirium Canyon north of Yucca Wash (Day et al. 1998).
eFor the purposes of GFM3.1, each formation in the Crater Flat Group was subdivided into six zones based on the requirements of the users of the Geologic Framework Model. The subdivisions are upper vitric (uv), upper crystalline (uc), moderately to densely welded (md), lower crystalline (lc), lower vitric (lv), and bedded tuff (bt) (Buesch and Spengler 1999, pp. 62–64).
fSequence 13 (Tptpv3–Tptpv2) is subdivided into 2 layers of equal thickness.
gSequence 11 (Tac) is subdivided into 4 layers of equal thickness.
hSequence 1 (Paleozoic) represents a bounding lower surface.

NOTE: Shaded rows indicate header lines for subdivided units.

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