Geology 104 - Spring 2007
Lecture 18

Death Valley NP, Big Bend NP


Intermontane Plateaus Physiographic Division - Basin and Range Province

Death Valley NP

Location and History

Geology

1. Stratigraphy

Formation

Rock

Age
 Alluvium; playa deposits  Sand & gravel; evaporites  Quaternary
Volcanic rocks  Basalt  Tertiary
 Layered basement rocks  Limestone  Mesozoic / Paleozoic
 Crystalline basement rocks Metamorphic rocks Precambrian

3. Structure

DV is located near a major branch of the San Andreas Fault System

Desert features

Big Bend NP

Location and History

Geology

1. Stratigraphy

 Formation

 Rock

Age
 Alluvium  Mostly gravel  Quaternary
 Chisos Fm  Igneous intrusives Tertiary
 Santa Elena, Boquillas Fm Limestone  Cretaceous
 Basement rocks  Conglomerate, sandstone, shale  Paleozoic

2. Topographic Features

Chisos Mtns in the central part of the park

"The Basin" = a stream valley through the mountains

The Rio Grande has cut 3 major canyons

RG is incised in these areas => recent uplift


Death Valley slides

Big Bend slides



END OF MATERIAL COVERED IN EXAM 2

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