Front:
OLDEST ROCKS OF
YOSEMITE REGION
THESE WRINKLED AND BROKEN STRATA ARE THE
OLDEST FORMATIONS OF THE YOSEMITE REGION
THEY WERE FORMED IN THE SEA AS DEPOSITS
OF MUD, SAND, AND OTHER MATERIALS, FOLDING,
BREAKING, AND CHANGE IN TEXTURE RESULTED
FROM MOVEMENTS WHICH PRODUCED THE ORIGINAL
SIERRA RANGE, NOW LARGELY WORN AWAY
IN FORMING THOSE ANCIENT MOUNTAINS, IMMENSE
MASSES OF MELTED ROCK MOVED UPWARD INTO THE
EARTH'S CRUST BELOW THE DISTURBED AREA. THIS
MOLTEN MATERIAL COOLED TO FORM GRANITE. THE
GRANITE MAY BE SEEN IN MERCED CANYON IMMEDI -
ATELY ABOVE EL PORTAL AND IN YOSEMITE VALLEY
ACROSS THE CANYON FROM THIS
POLISHED THESE
SE
3
2 SIN
STAND OUT
ROLD RELE
RIVER HAS
FOLDED LA
Bological Marker
On the All Year Highway
The scenic Route along the Merced River
Maripon to Yosemite National Park
California
F-7715
Back:
POST CARD
CORRESPONDENCE
ADDRESS
