J.E. Todd - State Geologist from 1893 - 1903.
This is a letter from J.E. Todd to the third South Dakota State Geologist, Freeman Ward.

J.E. Todd Letter from Todd to 3rd State Geologist, Freeman Ward.


Ellwood C. Perisho - State Geologist from 1903 - 1914.
Perisho

 

 

Freeman Ward - State Geologist from 1915 - 1926.

Ward

 

 

E. P. Rothrock - State Geologist from 1926 - 1957.

Rothrock

 

 

Allen F. Agnew - State Geologist from 1957 - 1963.

Agnew

 

 

Duncan J. McGregor - State Geologist from 1963 - 1978.

McGregor

Merlin J. Tipton- State Geologist from 1978 - 1992.

Tipton

Cleo M. Christensen - State Geologist from 1992 - 1997.

Christensen

Derric L. Iles- State Geologist from 1997 - present.

Iles