The Geology of Southern Oregon
Welcome Tu The liiitfiii' Hirer Valley
Dr. Evart P. Borden
[forming the eastern.
Ashland is situated on w hat was
The volcanics of the Cascades Lake 'O Woods, Em igrant reser
once the beach of an ancient sea turn to the west in the southern
and several other sm aller
on the eastern slopes of the Sis part of this area, forming the up- voir.
lakes and reservoirs.
kiyou mountains.
list over which highway 99 reach
These m ountains were at one es the Siskiyou summit.
time an island in this sea. They
Pilot rock, seen in this vicinity,
‘are m ade up of some of the oldest is 6,000 feet high and is an a n
rocks In Oregon.
cient volcanic core in the C as
Geologists state that the ser cades.
pentine. granites, limestones, mica
The Southern Pacific tracks at
shists and other complex m eta the little station of Siskiyou a l
Southern Oregon*®
m orphic rocks date as far back most coincides w ith the line
as one hundred fifty millions of w here the young volcanics touch
years. Gold is found in the quartz the ancient Siskiyous.
3 Went Sixth
veins of these rocks.
The sharp pointed hills, some
Bear valley in which Ashland having beacons on top. together
is located is the southern arm of w ith the two Table Rocks north
the Rogue River valley.
of Medford, are later volcanic in
They are composed
The northern slope of the Siski- trusions.
yous was drained in ancient times chiefly of basalt rock.
I
as it is today, by the Rogue river,
Source of above m aterial, O re
m aking it the oldest river in O re gon Geology, Thomas Condon,
The Ore Bln, published by the
gon.
Bear creek, the stream draining State D epartm ent of Geology and
Industries, Geological
Bear valley, flows through sedi M ineral
m entary m aterial known as the Map of the Medford Q uadrangle
Umpqua form ation. This form a and The M arble Halls of Oregon,
tion extends from the flag stop C. B. W atson (a form er resident
of Stinem an on the Southern P a of Ashland.)
cific railroad to beyond the Rogue
River w here it disappears under
the volcanics of the Cascades. It
forms the floor of Bear valley.
From the valley and bounding
it on the east, rise the Cascades,
which are m ountains of volcani Fisherm en from out of state and
m aterial. They are one hundred
million years younger than the in state who plan to spend their
Siskiyous. They w ere form ed in vacation fishing will find the a n
Motel
the epoch known in geology as sw er to the angler’s dream in the
the Miocene.
At this tim e the fish filled lakes and stream s of
Housekeeping Cottages
Cascades, Sierras and
m odern
Southern Oregon.
Rockies were being formde.
....... Rates by day or week
The Rogue River is known the
Grizzly peak, the high uplift
directly opposite Ashland to the world over as one of the finest
Natural Warm Water
east, is ju st a few feet short of salm on and steelhead stream s in
Swimming
Pool
8,000 feet in altitude. It is a vol existence. O ther stream s, where
canic cone. From the floor of Bear fishing is equally good include
Sulphur Baths
valley to the top of Grizzley is the big and L ittle Applegate, Em
igrant creek. Bear Creek, and
eight miles to climb.
Large Shady Picnic Grounds
So we have the oldest m oun tributaries of the Rogue.
Free of charge
Lakes
w
here
fish
grow
big
and
tains in Oregon form ing the w est
ern barrier of this valley and fat and sassy include Diamond
Bar-B-Cue Pits
some of the youngest m ountains Lake, Fish Lake, Four Mile Lake,
Acme Hardware
Soul hern Oregon
Fishing Is Good
Finest
Medford, Oregon
THE YEAR AROUND AT
JACKSON HOT SPRINGS
Everything for a Happy
Strange As It Seems by Ernest Hix
Says
Day, Week or Month
The SUPREME COURT
Is an Auto Court
in
ASHLAND, OREGON
And you’ll enjoy your stay here
J. Q. and Betty Adams, Props. 775 N. Main St.
For a
Clean
Well Regulated
Tavern
Jackson llol Springs
North of Ashland on 99
Hans Lassen, Mgr.
Desir Dining-Inn
LEOPARD LOUNGE
For Ladies and
Gentlemen
and
7 Course European Dinner
for Your Favorite
Beverage, it’s
Greyhound
Tavern
Center of Town
Ashland, Oregon
The Finest Food.,.
BETWEEN PORTLAND AND SAN FRANCISCO
Open Every Day Except Tuesday
FOR RESERVATIONS, PHONE 122
CENTRAL POINT, OREGON
4 miles north of Medford