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Local Geology

Bill Hirt
geology instructor

Bill Hirt photoDepartment of Biological and Physical Sciences
College of the Siskiyous
800 College Avenue
Weed, California 96094

Office: Science 217 (7-217)

Office hours: MWF 10:00-10:50 AM, TR 12:30-1:20 PM and by appointment

E-mail: hirt@siskiyous.edu

Office phone: 530·938·5255

Lab phone: 530·938·5157

Fax: 530·938·5506

Spring 2014 Schedule

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
8:00-8:50 AM            
           
9:00-9:50 AM            
           
10:00-10:50 AM office
hour
  office
hour
  office
hour
 
     
11:00-11:50 AM
GEOL 1140
Science 216
college
hour
GEOL 1140
Science 216
college
hour
GEOL 1140
Science 216
 
 
12:00-12:50 PM            
  office
hour
  office
hour*
   
1:00-1:50 PM GEOL 1220
Science 216
GEOL 1220
Science 216
GEOL 1220
Science 216
 
GEOG 1110
Science 216
GEOG 1110
Science 216
 
2:00-2:50 PM   GEOL1220
lab
Science 216
   
     
3:00-3:50 PM          
         
4:00-4:50 PM          
         
5:00-5:50 PM            
           
TBA GEOL 1120
online
GEOL 1120
online
GEOL 1120
online
GEOL 1120
online
GEOL 1120
online
GEOL 1120
online

6:30-9:20 PM, 23, 25-Apr
7:30AM-5:20 PM, 26-Apr

    GEOL 0860
Science 216
  GEOL 0860
Science 216
GEOL 0860
Science 216

* Once per month I will miss the first half hour of my office hour on Thursdays because of the Student Learning Council meetings. On those days I will hold the second half of my office hour from 2:45-3:15 PM in Science 216.

Academic Background and Research

I began my study of geology at Santa Monica College, and went on to earn my degrees from UC Los Angeles and UC Santa Barbara. Since earning my Ph.D. I have continued to study how felsic (silica-rich) magmas form, accumulate in Earth's crust and change composition as they cool, crystallize and interact with other magmas.

Although I have studied some very hot felsic lavas in Idaho that are related to the Yellowstone hotspot (Hirt, 2002), most of my work has been has been directed towards understanding the development of a suite of felsic magmas that accumulated deep underground in California's Sierra Nevada about 85 million years ago. The compositions and textures of rocks in the Mount Whitney Intrusive Suite suggest that Earth's crust warmed as the intrusion grew, and that this warming enabled magma near the center of the body to stay molten long enough for crystals and melt to separate on a large scale and form a compositionally-stratified magma reservoir (Hirt, 2007).

Campus and Community Service

During the Spring 2014 semester I will serve as a member of: