i agree with all of this except your novel idea that mxus
or any other boundary for that matter
accretes &or avulses
&
likewise
your pet notion expressed or implied here once again
that the mxus river sectors
& stream boundaries in general
necessarily move as a result of avulsions

for
in the first instance
these 2 terms
accrete & avulse
arent normally applied to boundaries at all
nor technically even to boundary streams per se
but only to the soils literally moved by the streams
or perhaps figuratively moved by them
in the case of sudden shifts in the stream courses

soils accrete or wash up gradually

& accrete doesnt normally mean subtract but only add soil

the opposite of accrete if any is probably decrease or erode

by contrast
lands avulse or are torn away suddenly

& tho avulse normally means only to separate & not to join
it is evidently also sometimes applied ignorantly to streams
in the sense of to suddenly shift course or position
but such shifts arent really the avulsions

rather the shifts produce the avulsions

& in the second instance
stream boundaries that arent frozen like caus do normally move
about when the streams they follow accrete soils to one bank or
the other
but not when the streams they follow suddenly shift course &
avulse lands
whether the boundaries follow the thalwegs or some other
aspect of the streams

--- In BoundaryPoint@yahoogroups.com, "Lowell G. McManus"
<mcmanus71496@m...> wrote:

> Unlike the MXUS river boundaries, which accrete and avulse

with the rivers, the

> CAUS waterway boundaries were frozen long ago. Thus, they

do not necessarily

> follow the modern thalwegs or even the streams. If an island

were to form at a

> tripoint, then the tripoint would become dry. I hasten to say,

however, that I

> believe that this particular "island" exists only in the mind of

Mapquest.

>
> Lowell G. McManus
> Leesville, Louisiana, USA
>
>
> ----- Original Message -----
> From: "Michael Kaufman" <mikekaufman79@y...>
> To: <BoundaryPoint@yahoogroups.com>
> Sent: Monday, August 02, 2004 10:43 PM
> Subject: Re: [BoundaryPoint] Re: ME-NB-QC
>
>
> > Yep, I know mapquest is not authoritative, but I
> > didn't think it would have depicted an entire island
> > that isn't there. It depicts the tripoint on the
> > shore of this island (obviously placing CA-US off the
> > thalweg). But there is precedence for CA-US not
> > following the thalweg of this river a little further
> > downstream. Note the several pene-enclaves of Canada
> > on the US side of the river: (size should be medium)
> >
> >
>

http://www.topozone.com/map.asp?z=19&n=5227262&e=50509
4&s=50&size=m&datum=nad83&layer=DRG25

> >
> > --- aletheiak <aletheiak@y...> wrote:
> >
> > > ahaha
> > > it was i who recently missed your mapquest
> > > attachment
> > >
> > > but you realize mapquest is notoriously unreliable
> > > especially for remote areas
> > >
> > > --- In BoundaryPoint@yahoogroups.com, "aletheiak"
> > > <aletheiak@y...> wrote:
> > > > but do you ask because it has been reported dry
> > > > or has someone recently missed it
> > > > or what
> > > >
> > > > --- In BoundaryPoint@yahoogroups.com, aletheia
> > > kallos
> > > > <aletheiak@y...> wrote:
> > > > > --- Michael Kaufman <mikekaufman79@y...> wrote:
> > > > >
> > > > > > was wet but now on shore of island?
> > > > > >
> > > > >
> > > >
> > >
> >

http://www.topozone.com/map.asp?z=19&n=5238603.00017414

> > > > &e=496066&datum=nad83
> > > > > > but then compare with the mapquest attachment
> > > below
> > > > > > has this point been visited recently?
> > > > >
> > > > > the only known & best imaginable visit
> > > > >
> > > > > class b
> > > > > as in
> > > > > basically been baptized bare bottom
> > > > >
> > > > >
> > > >
> > >
> >

http://ns36.super-hosts.com/~bjbsoftware.com/corners/pointdet

> > > > ail.php3?point=143
> > > > >
> > > > >
> > > > >
> > > > >
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> >