[CINC] Article

[Derek_Lohuis at nps.gov]

thank you karen for clearing up the misinformation in peter's article.

current research shows that the islands have never been connected to the
mainland. while they were once located down in the san diego area as karen
describes below, they were underwater at the time.

the mystery still remains on why the torrey pines only exist naturally in
la jolla and santa rosa island. there are some very good articles with
different theories on this subject in the island training manual.


Derek Lohuis
Channel Islands National Park
1901 Spinnaker Dr.
Ventura, CA 93001
805-658-5736



|---------+---------------------------->
|         |           Karen Sullivan   |
|         |           <gksully at pacbell.|
|         |           net>             |
|         |                            |
|         |           04/20/2008 07:57 |
|         |           PM MST           |
|---------+---------------------------->
  >--------------------------------------------------------------------------------------------------------------------------------------------------|
  |                                                                                                                                                  |
  |       To:       dvabbott <dvabbott at verizon.net>, Ron Dreher <RDreher at roadrunner.com>, CINMS-CINC Listserv                                        |
  |        <channel_islands_naturalist_corps at rain.org>                                                                                               |
  |       cc:       Derek Lohuis <derek_lohuis at nps.gov>, Clare Fritzsche <Clare.Fritzsche at noaa.gov>                                                  |
  |       Subject:  Re: [CINC] Article                                                                                                               |
  >--------------------------------------------------------------------------------------------------------------------------------------------------|




My understanding, from Tanya Atwaters presentation,
and the movable graphic in the whale kit, is that the
Channel Islands broke off of the continent of North
America many millions of years ago,  as the article
indicates, as a result of the 2 plates of the earths
crust moving in opposite directions.

They were once a part of the north american continent,
along with the Santa Monica mountains and the whole
transverse ranges in So Cal.  Since they broke away
and became islands, there has never been a land bridge
or connection back to the mainland.

What I do remember Tanya saying, that is contradictory
to the article, is that this breaking away occurred
long before there would have been anything like the
Torrey Pines growing on land, and so no one really
knows why the Torreys are in these 2 locations.

Tanya's webpage is  http://emvc.geol.ucsb.edu
(You'll have to paste this in, I can't seem to make it
a link) and there are a number of "movies" you can
watch to visualize the movement of the islands away
from the continent.

Karen



--- dvabbott <dvabbott at verizon.net> wrote:

> ³......what are now the northern Channel Islands
> were once connected to the
> mainland much farther south.²
> Please clarify the above phrase.
> If the island have NOT always been isolated from the
> mainland this is news
> to me.
> Furthermore it is NOT in keeping with information
> being passing on via
> CINP-VIP interps to visitors during the  Official
> Island Orientations.
>
>
> on 4/20/08 12:45 PM, Ron Dreher at
> RDreher at roadrunner.com wrote:
>
> >
>
>
> > _______________________________________________
> Channel_islands_naturalist_corps mailing list
> Channel_islands_naturalist_corps at rain.org
>
http://www.rain.org/mailman/listinfo/channel_islands_naturalist_corps
>