U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

U D

U

U

D

D

U

D

U

D

U

D

U

D U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

D

U

U

D

U

D

U

D

U

D

U

D

U

D

U

D

U

D

D U

D U

U

D

U

D

D U

U D

U D

U

U

U U

D

D

D D U D

U

U

D

U

D

D

U

D

U

D

U D

U D

U D

?

?

?

?

?

?

HIGHGATE

T

HRUST

HONEY

HOLLOW

FAULT

FA

ULT

COBURN

EDEN

NOTCH

FAULT

THRUST

HILL

BRANCH

BURGESS

FAULT

BROME

S

PRINGS

CHA

MPLAIN

CHA

MPLAIN THRUST

THRUST

GEORGE FAULT

HINESBURG

HINESBURG

THRUST

U

NDERHILL

T

H

R

U

ST

UNDERHILL

WHITC

OM

B

S

U

M

MIT

THRUST

M

O

NROE

FAULT

ST.

THRUST

HONEY

HOLLOW FA

ULT

ROCK

THRUST

PROSPECT

THRUST

Dbg

Dwdg

Dgq

Oam

Oam

Oam

Oam

Oam

Oam

Oam

Oam

Oar

Oam

Oam

Oaa

Oaa

Oaa

Oaa

Oaa

Oaa

Oaa

Oap

Oap

Oap

Oap

Oap

Oap

Oj

Oaa

Oar

Oar

Oarq

Oar

Oar

Oar

Oar

Oar

Oar

Oar

Oar

Oar

Oar

Oar

Oar

Oarq

Oar

Oar

Oar

Oaa

Oaa

Oaa

Oat

Oar

Oar

Oaa

Oa

Oar

Oaa

Oaa

Oap

Oam

Oaa

Oap

Oa

Oa

Ohi

Ohi Oj

Oj

Oj

Oj

Oj

Oa Ohi

Ows

Ows

Ows

Oj Oj

Oj

Owc

Ows

Owc

Owc

Owc

Op

Op

Op

Op

Op

Op

Op

Op

Op

Op

Op

Opr

Opr

Opr

Opr Opr

Op

Sg

Sc

Sf

Sf

Sf

Op

Op

Sr

Sc

Sc

Sc

Sc

Sc

Sc

Sc

Sc

Sc

Scm

Sf

Sf

Sf

Oac

Sf

Sf

Sc

Ohi

Sg

Sc

Sc

Sc

Sc

Sf

Sf

Ssm

Ssm

Ssm

Ol

Ol

Ol

Ol

Ol

Svf

Scm

Dgm

Scm

Scm

Scm

Scm

Scm

Scm

Scm

Scm

Scg

Scg

Scg

Scm

Scm

Scm

Sc

DSn

DSn

DSn

DSn

DSn

DSn

DSn

Oj

Oar

Ss

Ss

Ss

Ss

Ss

Ss

Ss

Ss

Ss

Ss

Ss

DSn

Ss

Ss

Ss

Ss DSn

DSn

Ss

DSn

Jme

Jmsy Jmg

Jmg

Jd Jd

Jd

Jd Jd

Jd

Jmg

Jmg

Jmg

Di

Di

Di

Di

Di

Di

Dih

Dih

Dih

Dih

Dih

Dih

Dir

Dgm

Dgmg

Dgmg

Dgmr

Dlr

Dlr

Dlr

Dl

Dlr

Dl

Dl

Sf

Sc

Sc

Dbgn

Dbgn

Dfqm

Dfqm

Dco

Dco

Dco

Dcoa

Dia

Dia

Dia

Dia

Dia

DSfr

DSfr

DSfr

DSfr DSfr

DSfr

DSfra

Dr

Dr

Dr

Sc

DSwi

DSwi

DSwi

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs

Dgqs Dgqs

Dgqs

Dgqs

Dgqs

Dl

Dl

Dl

Dla

Dl

Dlr

Dlr

Dlr Dlr

Dlr

Dla

Dm

Dm

Dm

Dm

Dm

Dm

Dl

Dl

Dl

DSw

DSw

Kmd

Kmd Kmd Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw

DSw DSw

DSw

DSw

Dgq

Dgq

Dgq

Dgq

Dgq

Dgq

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga

Dga Dga

Dga

Dga

Dga

Dga

Dga

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

DSwa

Dgr

Dgr

Dgr

Dgr

Dgr

Dgr

Dgqs

Dgqs

DSwc

DSwc

Dgm

Dgm

Dgm

Dgm

Dgm

Dgmr

Dgmr

Dgmr

DSwgs

DSwgs

DSwgs

DSwgs

DSws

DSwac

DSwac

DSwac

DSwac

Dwwz

Dfpg

Dd

Dabg

Dabg

Dabg

Dabg

Dvbg

Dvbg

Dvbg

Dvbg

Dvbg

Dvbg

Dnbg

Dmbg

Dmbg DSfr

Dkbg

Dkbg

Dbbg Dbbg

Dbqm

Dst

Ddbg

Debg

Dedg

Dedg

Degr

Dnqm

Dnqm

Dniz

Dniz

Dwmz

Dwmz

Dwhz

Dga

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg Dbg

Dbg

Dbg

Dbg

Dbg Dbg

Dbg

Dbg

Dbg

Dbg

Dg

Dg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dbg

Dg

Dbg

Dbg

Dbg

Dg

Dg

Dg

Dg

Dg

Dg

Dg Dg

Dbg Dg

Ddbg

Ddbg

Dnwz

Dnwz

Ddrz

Ddrz

Dhg

DSwa

DSwa

Dhg

Dbg

Dhg

Dga

Oar

Oj

Dbg

Dgm

Dgmr

Dgmc

Oalp

Oal

Oal

Oal

Oal

Oal

Oal

Oal Oalm

Oal

Oal

Oal

Oal

Oal

Oal

Oal

Oal

Oalm

Oal

Oali

Oali

Oals

Oals

Oals

Oals

Oals

Oals

Oals

Oals

Oals

Oals

Oals

Oals

Oal

Oal

Oal

Oal

Omp

Omp

Omp

Omp

Omp

Omp

Omp

Owb

Owb

Owbg

Owbg

Owbg

Owb

Owb

Owb

Owb

Oma

Oma

Omr

Oma

Omp

Oma

Ogm

Sbd

Omfs

Omfs

Omfs

Omfs

Omfv

Owb

Owb

Owb

Ombb

Ombb

Ochic

Ochic

Ochic

Ochic

Ochs

Ochs

Ocha

Ochs

Ochs

Ochu

Ochu

Ochu

Ochfg

Ochfv

Ochfv

Ochfv

Ochfg

Ochu

Ochq

Sbd

Ochv

Ochv

Ochv

Ochv

Ochv

Ochs

Omwhg

Omwh

Omhb

Omhb

Omhb

Omfq

Oma

Oma

Oma

Omp

Omp

Omp

Omp

Omfs

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Zsd

Zs

Zs

Zs

Zs

Zs

Zs

o

oq

oq

oq

of

obq

obq

obq

obq

obq

ocf

ocf

obq

obq

oq

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oa

oa

oa

o

o

o

Zu

Zu

Zu

Zs

Zs

Zs

Zs

Zu

Zu

Zu

Zu

Zu

Zs

Zs

Zs

Zs

Zs

Zs

Zu

Zu

Zu

Zs

Zsd

Zsg

Zsg

Zsbg

Zsbg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsgp

Zsg

Zsg

Zu

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsg

Zsa

Zsa

Zphq

Zpha

Zphb

Zpha

Zpha

Zpha

Zpha

Zpha

Zpha

Zph

Zph

Zfqz

Zf

Ztrg

Zf

Zf Zf

Zf

Za

Zfs

Zfqz

Zph

Zph

Zhn

Zhn

Zhn

Zhn

Zhn

Zhn

Zsa

Zsa

Zsg

Zsg

Zswa

Zsws

Zsws

Zsws

Zsws

Zswa

Zswa

Zswa

Zswa

Zswa

Zswa

Zu

Zu

Zj

Zj

Zj

Zj

Zj

Zhn

Zswa

Zswa

Zsg

Zsg

Zsd

Zj

Zj

Zj

Zj

Zhng

Ztm

Ztm

Ztm

Ztm

Ztm

Ztagn

Ztagn

Zhng

Ztp

Zsd

Zf

Zf

Zf

Zf

Zf

Zf

Zf

Zf

Zsd

Zs

Zsd

Zjg Zu

Zu

Zu Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zu Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zu

Zutc

Zutc

Zutc

Zutc

Zu

Zu

o

oa

oa

oa

oq

oq

oa

oq

oq

oa

o

o

o

o

o

o

o

opw

opw

opw

Zsbg

Zsbg

o

o

Dbg

Oalp

Oalp

Dbg

Ochpq

Ochcv

Ochu

Ochu

Ochu

Ochu

Ochu

Ochp

Ochp

Ochs

Ochuc

Ochuc

Ochuc

Ochu

Ochuc

Ochs

Och

Ochpq

Och

Ochs

Ochs

Ochsb

Ochsb

Ochsb

Ochsb

Ochsb

Ochsb

Ochuc

DSn

Ochfv

Ochfv

Ochfv

Ochpq

Ochcv

Ochcv

Ochcv

Ochcv

Ochcv

Sng

Sng

Sng Sng

Sng

Snd

Snd Snd

Snd

Snd

Sng

Omw

Omw

o

o

o

Zj

Zj

Zj

Zjg

Zjg

Zjg

Zj

Zj

Zj

Zhng

Zhng

Zhn

Zhn

Zhn

Zhng

Zhng

Zhng

Zhng

Zsbg

Zsbg

Zutc

Zhng

Zhn

Zfa

Zfa

Zutc

Zutc

Zutc

Zutc

Zu

Zu

Zu

Zu

Zu

Zf

Zhn

Zhn

Zhng

Zhng

Zhng

Zhng

Zhng

Zhng

Zhng

Zhng

Zhn

Zhn

Zhn

Zhn

Zhn

Zhn

Zhn

Zhn

Zhn

Zap

Zap

Zap

Zh

Zhn

Zhn

Zhn

Zhn

Zph

Zph

Zpha

Zph

Zph

Zph

Zpha

Zpha

Zpha

Zpha

Zpha

Zpha

Zpha

Zphw

Zphw

Zpha

Zhn

Za

Za

Za

Za

Zmt

Ztrg

Zhtm

Zhn

Za

Zhnn

Zhn

Zmt

Zhn

Zhn

Zhn

Zhn

Zhn

Zhng

Zhng

Zpu

Zpv

Zfd

Zfd

Zfd

Zps

Zps

Zpcg

Zpcg

Zpcg

Zpcg

Zpcg

Zpcg

Zpcg

Ztd

Zpcg

Zpcg

Zfd

Zfco

Zfc

d

d

d

Zfco

Zfd

Zfd

Zfd

Zps

Zps

Zpw

Zpw

Zpw

Zpw

Zps

Zps

Zmp

Zmp

Zpw

Zpu

Zunql

Zunql

Zunql

Zunw

Zung

Zun

Zpu

Zung

Zung

Zung

Zung

Zung

Zung

Zung

Zung

Zung

Zun

Zun

Zun

Zfa

Zf

Zf

Zf

Zf

Zf

Zf

Zfw

Zf

Zf

Zf

Zf

Zf

Zf

Zf

Zf

Zf

Zfa

Zf

Zf

Zf

Zf

Zf

Zf

Zfs

Zfs

Zfs

Zfs

Zfs

Zfs

Zfa

Zfa

Zfa

Zf

Zfs

Zfs

Zfs

Zu

Zf

Zf

Zf

Zf

Zung

Zhab

Zhab

Zungs

Zunql

Zun

Ztgr

Zun

Zmtg

Ztgr

Ztgr

Ztgr

Zbc

Zbc

Zbf Zbagn

Zbf

Zbu

Zbu

Zbu

Zbf

Zhn

Zbf

Zbg

Zbg

Zbagn

Zutc

oa

oa

oa

o

o

o

c

c

c

du

du

du

du

d

sp

w

m

oa

oa

oa

oa

Zbs

opw

opw

opw

opw

opw

opw

opw

o

o

o opw

opw

Omc

Omc

Omq

Ochu

Ochv

Omhb

Omc

Omc

Owb

Omc

Oma

Oma

Omc

Ochfv

Sbg

Sbd

Sbd

Y3Agb

Y3Agb

Y1,2bg

Y1,2bg

Y1,2bg

Y1,2bg

Y1,2bg

Y1,2bg Y1,2bg

Y1,2bg

Y1,2bg

Y2q

Y2q

Y3Ala

Y3Ala

Y2cs

Zd

Zd

Zd

Zd

Zd

Zd

Zd

Zd

Y2lg

Y2rs

Y2lg

Y2lg

Y2rs

Y2rs

Y2rs

Y2myu

Y2mig

Y3Amb

Y3Amb

Y2a

Y1,2be

Y1,2be

Y1,2be

Y2a

Y2a

Y2a

Y2a

Y2a

Y2a

Y2a

Y2a

Y2q

Y2q

Y3Agb

Og

Og

p

sk

sp

sp

sp

Osw

Oml

Ogf Oml

Ocgu

Ocgu

Ocgu

Oo

Oo

Ohg

Ohg

Ohg

Ob

Obku

Obku

Oib

Ogf

Ochd

Obku

Obku

Obku

Os

Os

Ocu

Oml

O

Os

Os

Os

Os

Os

Os

Os

Ov

Ov Ov

Os

Os

Os

Os

Ocu

Ocu

Ocu

Ocu

Ocgu

Ocp

Ocp

Odp

Ocu

Ocu

Ochd

Ochd

Ocu

Ocu

Ocu

Ocw

Ob

Ob

Ob

Ob

Ob

Ob

Ob

Ob

Ob

Omi

Ob

Ob

Ocbe

Ocbe

Ocbe

Omi

Omi

Omi

Omi

Oh

Oh

Oh

Oo

Oo

Oo

Oo

Oo

Oo

Oo

Oo

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Obr

Obr

Ocbrp

Ocbrp

Ocgu

Ocbrp

Ocbrp

Ocbrp

Ocbrp

Oib

Oib

Ogf Osp

Odp

Osp

Osp

Osp

Kbh

Osp

Oib

Oib

Oib

Ochd

Ocha Osp

Osp

Osp

Osp

Osp

Osp

Osp

Ocp

Ocp

Ocp

Odp

Obr

Ogf

Ogf

Osp

Opi

Opi

Osp

Ogf

Ogf

Ogf

Osp

Osp

Ogf

Ogf

Ocp

Ocp

Ocp

Ocp

Ocp

Obr

Obr

Obr

Obr

Ob

Ob

Odp

Odp

Odp

Ochd

Ochd

Ochd

Ochd

Ochd

Ochd

Ochd

Ov

Ov Ov

Ov

Ov

Osp

Osp

Osp

Osp

Osp

Osp

Osp

Ocgu

Ocgu

Ocgu

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ogf

Ov

Ocp

Oo

Ocp

Ocp

Ocp

Ocp

Ocp

Ocp

Ocp

Ocp

Ocp

Ocp

Osp

Obr

Obr

Ocp

Ocp

Ocp

Ocp

Ocp

Ocp

Oo

Oo

Oo

Ow

Ow

Ocp

Ocu

Ob

Ob

Ocp

Odp

Odp

Odp

Ofcpi

Odp

Odp

Ocp

Ocp

Ocp

Ocp

Ocp

Odp

Oib

Oib

Oib

Oib

Oib

Oib

Oib

Oib

Oib

Oib

Oib

Oha

Ov

Oha

Oha

Odp

Ob

Ob

Ob

Obr

Obr

Obr

Obr

Obr

Obr

Obr

Obr

Obr

Obr

Obr

Obr

sp

du

p

p

p

pdo

ps

pdo

pdo

pq

ps

ps

pc

pc

psc pq

psh

psh

pdo

ps

Oskl

Oskl

Oskl

Oskl

Oskl

Oskl

du

Zfp

Zfp

pdo

pdo

pdo

pq

pdo

psc

psc

c

c

c

c

du

Osk

Oskl

Osks

Zwb

Zpu

Zpu

Zpu

Zpu

Zpu

Zpu

Zwb

Zwb

Zwb

Zwb

Zwb

Zfp

Zfp

c

Zpu

Zwb

Zwb

Zfp Zth

c

du

du

c

c

Zpu

Zpu

Zpu

Zpu

Zpu

Zpu

Zwb

Zwb

Zwb

Zwb

Zfp

Zfp

Zfp

Zfp

Zth

Zth

Zwb

c

Owb

Owb

Zwb

Zun

Zpu

Zwb

Zth

Zth

Zpq

Zfp

pdo

pdo

pc pdo

pc

pq

pq

pq

pq

psc

psc

psc

psc

c

ca

du

du

Osk

Oskl

Oskl Osks

Oskl

Zpu

Zpq

pdo

w

m

pq

c

ca

sp

ca

du

du

du

du

d

du

Osk

Osk

Oskl

Oskl

Oskl

Osk

Zfp

c

w

m

c

ca

ca

ca

sp

sp

du

du

du du

du

d

Osk

Osk

Oskl

Oskl

Os

Os

Os

Ocu

Zfp

c

c

c

w

da m

sp

du

Osks

Oskl

Os

Ocu

Ob

Osk

Osk

Osk

Osk

Zpvf

Zpu

Zpu

Zpu

Zfp

c

c

w

w

d

d

du

sp

sp

m

Os

Ocu

Ocu

Os

Ocu

Ob

Zpc

Zpu

Zpv

Zpc

c

c

c

c

du

du

du

du

m

m

m

w

m

Zfp

c

ca

c

c

du

du

d

sp

w

m

Os

Ocu

Ocw

Ocbu

Ob

d

d

d

sp

sp

sp

m

w

m

Ocu

Ocw

Ocbe

Ocbrp

Ocbrp

Osp

Ocp

Ocp

Ocp

Obr

Ob

sp

sp

w

Os

Ocu

Ocw

Ocbu

Omi Ob

Oh

Oh

Oh

Ocbrp

Oib

Ogf

ti

Zj

Zj

Zhng

Zhn

Zjg

Zhn

Zth

Zhn

Zf

Zf

Zf

Zjg

Zjg

Zu

Zutc

Zutc

Zu

oq

o

Zpu

Zun

Owb

Owb

Owb

Owb

o

o

Zj

Zj

Zhng

Zhng

Zung

Zun

Zpu

Zpvc

Zpu

Zpv

Zpva

Zpva

Zwb

Zwb

Zwb

Zfp

Zf

o

Zj

Zj

Zutc

Zu

Zu

Zunw

Zunw

Zunw

Zunw

Zung

Zunw

Zunw Zu

Zhn

Zpvc

Zpvc

Zpvc

Zpvc

Zpu

Zpvf

Zpva

Zpva

Zpva

Zpva

Zpva

Zpva

Zpva

Zpvf

Zpvf

Zpu

Zpu

Zpv

Zpv

Zpq

Zpq Zpv

Zun

Zun

Zfp

Zfp

Zf

Zfa

Zfa

Owb

Owb

Owb

Osw

Owb

Owb

Osw

o

Zfa

Zutc

Zung

Zu

Zu

Zu

Zhng

Zhn

Zhn

Zhn

Zhn

Zhng

Zhng

Zpvc

Zpvc

Zpu

Zpu

Zpu

Zpvf

Zpvf

Zpvf

Zpva

Zpva

Zpva

Zun

Zfp

Zf

Zfs

Zf

Zf

Zf

Zf

oa

Owb

Owb

Owb

o

Zj

Zfp

Zfp

Zfp

Zung

Zun

Zung

Zf

Zf

Zhn

Zhng

Zhng

Zhng

Zhng

Zhng

Zhn

Zhnn

Zpu

Zpw

Zpq

Zpu

Zpu

Zpu

Zpv

Zpu

Zpu

Zpu Zpw

Zpw

Zpw

Zpw

Zpu

Zpvf

Zun Zun

Zun

Zfp

Zfs

Zfs

Zf

Zf

Zf

Zf

Owb

Owb

Owb

Owb

o

oa o

oa

Zfp

Zfp

Zun

Zun

Zu

Zhng

Zhng

Zhng

Zhng

Zhng

Zhng Zung

Zhng

Zu

Zu

Zhn

Zhn

Zhn

Zhn

Zhnn

Zhnn

Zhn

Zj

Zhnn

Zpv

Zpva

Zpva

Zpvc

Zpu

Zpu

Zpu

Zpu

Zpw

Zpw

Zun

Zung

Zung

Zun

Zun

Zfw Zun

Zfw

Zfw

Zf

Zf

Zf

Zf

Zf

Zf

Zf

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

Kmd

47

48

29

45

30

31

28

27

33

40

41

34

35

44

42

50

36

38

39

Oar

Op

Black River

Missisquoi River

LucasBrook

Big Falls

Lake Memphremagog

Lake ChamplainLake Champlain

Lake Champlain

Lake Champlain

Fairfield Pond

Zf

Yu

Yu

Zf

Zf

Zbu

Zu

Zu

Zu

Zu

Zbc

Zbf

Zbagn

Zbagn

Zbg

Zhn

Zhn

Zhn

Zsg

Zsg

Zsg

Zf

o

o

Zj

Zjg

Zj

Zj

Zun

Zun

Zun

Zun

Zu Zhn

Zhn

Zung

Owb

Zpu

Zpv

Zpv

Zpu

Zs

Zs

Zs

Zs

Zsd

Zsd

Zsbg

o

o

o

o

o

o

opw

Ochu

Ochcv

Ochcv

Ochuc

DSwac DSw

Ochp Omp

Omw

?

Omw

DSn

Zpu

Zpu

Zpu

Zp

Zpu

Zpu

Zfp

c

du

Zfp

Osw

Zsd

Zsd

Zu

Zu

Zu

Zu

Zth

Zth

Zth

Zth

Zth

Zhn

Zhn

Zhn

Zhn

Zun

Zun

Zsbg

Zs

Zs

Zs

Zf

Zhn

Zf

Zf

o

o o

o

o

o

oq

oa

opw

Ochu

Ochuc Ochu

Ochsb

Ochsb

Ochcv

Och

Och

Och

Ochpq Owb

Omp

Omw

Yu

Yu

Sng

Snd

Snd

Snd

DSn

Ss

DSwac

Yu Yu

pt

Obku

Obku

Obku

Obku

pt

pt

Zfp

Zfp

Zfp

p

c

c

c

du

du

du

Ogf

Oo,Ocg Oo,Ocg

Oo,Ocg

Zwb

Zwb

Zun

Zpv

Zpv

Zf Zf

Zf

Zpva

Ocgu

Ochd

Ocgu

Ocgu

Osw

Osw

Osw

Osw

Osk

Ogf

Ogf

Ogf

Osp Oib

Osp

Osp

Osp

Osp

Oib Oib

Oml

Oml

Oo

Oib Zpu Zpu

Zhn

Zhn

Cold HollowMountainsBelvidereMountain

LowellMountains

East Albany

Miles Hill Indian Point

GREEN MOUNTAINS

GREEN MOUNTAINS

Isle La Motte

North Hero Island

Holiday Point

Giddings Hill

VT/NY State boundary

Cheney Point

THRUST

ROCK

PROSPECT

HONEY

HOLLOW FAULT

C

OBU

R

N

HILL

THRUST

SURFACE

SURFACE

GREEN MOUNTAIN ANTICLINORIUM

LOWELL MOUNTAIN

ANTICLINE

BROME FAULT

PROSPECT ROCK THRUST

HONEY

HOLLOW

FAULT

BURGESS BRANCH FAULT

COBU

RN

HILL THRUST

(t)

(t)

(t)

(t)

(t)

(t) (t)

(t)

(t) (t)

(t)

(a)

(a)

(a)

SURFACE

SURFACE

LOWELL MOUNTAIN ANTICLINE

Magog Group rocks?

(of Quebec)

GREEN MOUNTAIN ANTICLINORIUM

(t)

(t)

(t)

(t)

(t)

(t)

(a)

(a)

(a)

 ́

CHAMPLAIN THRUST

HIGHGATE SPRINGS THRUST

SURFACE

SURFACE

CHAMPLAIN VALLEY

ST. ALBANS SYNCLINORIUM

UNDERHILL THRUST

(t)

(t) (t)

KILOMETERS

1

1

2

2

3

3

4

4

5

SEA LEVEL

1

1

2

2

3

3

4

4

5

SEA LEVEL

KILOMETERS KILOMETERS

1

1

2

2

3

3

4

4

5

SEA LEVEL

1

1

2

2

3

3

4

4

5

SEA LEVEL

KILOMETERS

A

E

B

F

C

G

D

A’

E’

B’

F’

D’

C ’

G ’

A A ’

Undifferentiated rocks of the Mount Holly Complex shown at depth are designated Yu.

Dotted contact indicates facies change

B ’

Undifferentiated rocks of the Mount Holly Complex shown at depth are designated Yu.

Dotted contact indicates facies change

B

EXPLANATION OF MAP SYMBOLS

Contact—Approximately located; dashed where encloses overprint pattern; 

dotted where concealed by water

Faults—Approximately located; dashed and queried where uncertain; dotted 

where concealed by water. On cross sections, age of principal movement 

where known is shown by (t), Taconian; (a), Acadian; (M), Mesozoic

Thrust fault—Pre-metamorphic or early metamorphic; sawteeth on 

upper plate. Age of principal movement is considered oldest Taconian

Thrust fault—Syn-metamorphic or post-metamorphic with respect to 

either Taconian or Acadian metamorphism. Sawteeth on upper plate

Strike-slip fault—Arrows show sense of lateral relative movement. Age of 

principal movement is considered Acadian or Alleghanian

Normal fault—Ticks on downthrown side; arrows indicate sense of 

oblique relative movement where known. Age of principal movement is 

considered Acadian, Alleghanian, or Mesozoic

Brittle fault—Sense of movement, where known, is shown by U, 

upthrown side; D, downthrown side

U-Pb zircon sample site—See table 1 on back of sheet 3

The geology portrayed in adjacent Massachusetts, New York, and New Hampshire is partly 

subdued to more clearly define the geographic limits of the State of Vermont. Some of the 

geology shown in these adjoining areas was newly surveyed for this map in order to obtain a 

better understanding of the rock units and structures within Vermont.

U

D

SCIENTIFIC INVESTIGATIONS MAP 3184

BEDROCK GEOLOGIC MAP OF VERMONT

SHEET 2 OF 3

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

MARCIA K. McNUTT, DIRECTOR

Prepared in cooperation with the

STATE OF VERMONT, VERMONT AGENCY OF NATURAL RESOURCES,

VERMONT GEOLOGICAL SURVEY

LAURENCE R. BECKER, STATE GEOLOGIST

TRIMLINE TRIMLINE

Northern map sheet

Base from U.S. Geological Survey, 1:100,000

Groveton, ME-NH-VT, 1986; Lake Champlain North, NY-VT, 1986; Lake 

Champlain South, NY-VT, 1986; Montpelier, NH-VT, 1988; Mount 

Mansfield, VT, 1989; Mount Washington, ME-NH-VT, 1988; Rutland, 

NH-VT, 1985; Sherbrooke, ME-NH-VT, 1986; Ticonderoga, NY-VT, 1989

Projection and 10,000-meter grid, zones 18 and 19,

Universal Transverse Mercator

1927 North American Datum

This map is available for sale by U.S. Geological Survey, Information 

Services, Box 25286, Denver Federal Center, Denver, CO 80225

For product and ordering information:

World Wide Web: http://www.usgs.gov; Telephone 1-888-ASK-USGS

Any use of trade, product, or firm names in this publication is for descriptive 

Printed on recycled paper purposes only and does not imply endorsement by the U.S. Government

Suggested citation:

Ratcliffe, N.M., Stanley, R.S., Gale, M.H., Thompson, P.J., and Walsh, G.J., 

2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific 

Investigations Map 3184, 3 sheets, scale 1:100,000.

GIS database compiled by Gregory J. Walsh and Marjorie H. Gale

Digital cartography by Linda M. Masonic

Edited by James R. Estabrook

The Vermont Geological Survey would like to thank former State Geologists 

Charles Ratte for initiating State support and Diane Conrad for continued work 

on this map.

 ́

BEDROCK GEOLOGIC MAP OF VERMONT

By

Nicholas M. Ratcliffe,1 Rolfe S. Stanley,2* Marjorie H. Gale,3 Peter J. Thompson,3 and Gregory J. Walsh1

With contributions by

Norman L. Hatch, Jr.,1* Douglas W. Rankin,1 Barry L. Doolan,2 Jonathan Kim,3 Charlotte J. Mehrtens,2 John N. Aleinikoff,1 and J. Gregory McHone4

1U.S. Geological Survey, 2University of Vermont, 3Vermont Geological Survey, 4Wesleyan University, *Deceased.

2011

Cartography by Linda M. Masonic1

73°15’ 73°00’ 72°45’ 72°30’ 72°15’

71°45’

73°15’

73°00’

72°00’

72°45’

72°30’

72°15’

71°30’

71°30’

71°45’

72°00’

45°00’

44°00’

44°15’

44°30’

44°45’

45°00’

44°00’

44°30’

44°15’

44°45’

1 0 1 3 4 5 6 7 8 9 10 KILOMETERS

SCALE 1:100 000

1 0 1 2 8 MILES

2

3 4 5 6 7

CONTOUR INTERVAL 20 METERS

APPROXIMATE MEAN

DECLINATION, 2011

14 / ° 1 2

MAGNETIC NORTH

TRUE NORTH

NEW YORK

N.H.

R.I.

MASS.

QUEBEC, CANADA

CONN.

MAP LOCATION

 ́

QUEBEC, CANADA

MASSACHUSETTS

NEW 

HAMPSHIRE

 ́

N

E

W

Y

O

R

K

GEOLOGIC STRUCTURE MAP

EXPLANATION

Selected allochthons and fault slices

(others labeled)

Piermont allochthon

Mount Abraham slice

Prospect Rock slice

Taconic allochthon

Belvidere Mountain Structural Complex and Tillotson 

Peak Complex (TPC)

Igneous rocks and Mesoproterozoic basement

White Mountain Igneous Suite—Dikes and plutons 

shown (Cretaceous and Jurassic)

New Hampshire Plutonic Suite—Dikes and plutons 

shown (Devonian)

Lake Memphremagog Intrusive Suite (Silurian)

Oliverian and Highlandcroft Plutonic Suites (Silurian 

to Ordovician)

North River Igneous Suite (Ordovician and Late 

Cambrian)

Cardinal Brook Intrusive Suite (Neoproterozoic)

Mesoproterozoic basement rocks

Connecticut Valley trough

Ultramafic rocks

(serpentinites)

Contact—Not shown around many granite plutons

Faults

Early orogenic thrust fault—Sawteeth on upper 

plate. Abbreviation: (t), Taconian

Syn-metamorphic or post-metamorphic thrust 

fault—Sawteeth on upper plate. Abbreviations: (t), 

Taconian; (a), Acadian

Strike-slip fault—Arrows indicate relative movement

High-angle fault—Abbreviation: (M), Mesozoic

Normal fault—Ticks on downthrown side. Abbreviation: (M), Mesozoic

Folds

Antiform

Synform

Overturned antiform

Overturned synform

Inclined late Acadian fold in Connecticut Valley 

trough

U-Pb zircon sample site—See table 1 on back of sheet 3

G

R

E

E

N

M

O

U

N

TAIN

M

A

S

SIF

BRO

O

K FA

ULT

O

RWELL T

HRU

S

T

RIV ER

TH

R

U

ST

HUBBAR

DT

O

N

HINESBURG

TH

RUST

TH

RUST

ROCK

PROSPECT

THRUST

S

T. GEORGE FA

ULT

HIGHGATE

SPRINGS

T

H

R

U

ST

FAULT

CHAMPLAIN

TH

R

U

ST

Taconic allochthon

Rift clastics

Ordovician accreted rocks

Connecticut Valley trough Shelf and clastic

sequence

Laurentian basement

Laurentian margin

Ordovician

accreted rocks Shelf and clastic sequence Connecticut Valley trough Rift clastic suite

and volcanics

Transitional

margin rocks

Rensselaer

Plateau 

slice

North

Petersburg

slice

Dorset

Mountain

slice

Pawlet

window

Bird

Mountain

Moretown

slice

Moretown

slice

Sudbury

slice

Mt. Abraham

slice

Braintree

Intrusive

Complex

Comerford

Intrusive

Complex

Comerford

Intrusive

Complex

Piermont

allochthon

Green

Mountain

slice

(GMS)

Green

Mountain

slice

Prospect

Rock

slice

Averill pluton

Echo

Pond

 pluton

Monadnock

Mountain

pluton

Derby

pluton

Newport

Intrusive

Complex

Willoughby

pluton

Maidstone

pluton Newark

pluton

Knox

Mountain

pluton

East Barre

plutons

Eltey Mountain

Granite

East Bethel

plutons

Victory

pluton

Nulhegan pluton

RoweHawley

Zone

Mount

Ascutney

pluton

ROWEHAWLEY

ZONE

ROWEHAWLEY

ZONE

William Miller

Chapel window

Cuttingsville

stock

Fall Mountain

nappe

Skitchewaug

Mountain

nappe

Bernardston

nappe

Sunset

Lake

slice

Adirondack

basement

rocks of

the Bald

Mountain

block

Ira

Lincoln

Mountain

massif

(t)

(t)

(t) (t)

(t) (t)

(t)

(t)

(t)

(t)

(t)

(t)

(t)

(t)

(a?)

(a)

(t)

(t)

(t)

(t)

(t)

(a)

(a)

(a)

(a)

(a)

(a)

(a)

(a)

(a)

(a) (a)

(a)

(a)

(a)

(a)

(a)

(t)

(t)

(t)

(t)

(t)

(t)

GMS

GMS

TPC

Belvidere

Mountain

Complex

(t)

(t)

(t)

(t)

(t)

(t)

(t)

(M)

(M)

(t)

(t)

(t)

(t)

(t)

(t)

(t)

(t)

(t)

U

N

DER

HILL THRUST

WHITCOMB

SOUTH

NEWFAN

E

THRUST

WEST

MIN

STE

R

WEST

FAULT

Z

O

N

E

S

U

M

MIT

TH

RUST

Guilford

do

me

C

H

E

S

TER

D

O

ME

ATHENS

DOME

Vernon dome

Keene

dome

GID

DIN

G

S

COBURN HILL

EDEN

NOTCH

FAUL

CH

T

AMPLAIN

BROME

THRUST

Strafford dome

AMMONOO

S

U

C

FAULT

MONROE

FAU

LT

MONROE FA

ULT

Lebanon dome

Comerford

Complex

Pomfret dome

Proctorsville syncline

B

U

R

GESS

BRA

N

C

H

FAULT

H

O

NEY

HOLLOW FAU

LT

LOWELL

MOUNTAIN

ANTICLINE

HINESBURG SY

N

CLINORIU

M

BRONSON

HILL

ANTICLINORIUM

B

R

O

N

S

O

N

HILL

ANTICLIN

ORIU

M

ST. ALBANS

SYNCLINORIUM

M DI DLEBURY SYNCL NI ORIU

M

G

R

E

E

N

M

O

U

N

TAIN

A

N

TIC

LINORIUM

CON

NECTICUT

VA L LE Y

TR

O

U

G

H

(M)

(M)

(M)

TACO

NIC

ALLOCHTHON

TH

R

U

ST

TACO NIC

(t)

(t)

(t)

(t)

(t) (t) (t)

(t) FRONTAL

HIGH

TACONICS

PINE

HILL

T

HRUST

GREEN

MOUNTAIN

FRONTAL

T

H

R

U

ST

WH

TI C

O

M

B

S

U

M

M

TI T

H

R

U

ST

73°00’ 72°00’

45°00’

44°00’

44°30’

45°00’

44°00’

44°30’

43°00’

73°00’

43°30’

43°00’

43°30’

10 0 10 20 30 KILOMETERS

SCALE 1:500 000

10 0 10 20 MILES

13

21

51

47

29

45

30

31

28

27

33

40

41

34

35

44

42

50

36

38

39

9 10 16

23

5

4

46

2

24 17

25

32

14 15

3

12 1

7

11

8

19

48

22

6

6B

26

49

37

18

43

20

46

A

E

B

C F

G

D

A’

E’

B’

F’

D’

C’

G’

H

H’

I

I’

J’

J