Schematic of Boreholes and Vault at the Oklahoma Geological Survey Observatory 


 Vault       Glasnost bore               Leonard bore       Crosstimbers bore
_______________________________________________________________________________
=======           |                           |Geotech 20171A       |
TUL               |                           | LNO sz3             |
sz sn se          | Geotech                   |                     |
                  | KS5400-0103               |                     |
Mostly               TUL         500'  69F    |                     |
Pennsylvanian        bz bn be                 |                     |   
Thick Shales,        vlpz (tide)              |                     |   
Thin Sandstones,                              |                     |   
Thin Limestones                 sea level     |                     |   
Some Mississippian              1000'  81F    |                     |   
Some Siluro-Devonian                          |                     |   
                                              |                     |   
                                              |                     |
                                              |Geotech 23900        |   
                                1500'  92F    | LNO sz2             |   
                                              |                     |   
                                              |                     |   
                                              |                     |   
                                              |                     |   
                                2000' 102F    |                     |   
                                              |                     |   
..............................................|.....................|..........
                                      105F    |                     |   
Cambro-Ordivician                             |                     |   
Arbuckle Dolomite               2500' 107F    |Geotech 23900        |
                                                LNO sz1             |
                                                                    |
                                                                    |Guralp
                                                                      CMG-1
                                3000'                                 LNO
                                                                      hz,hn,he
                                                             bz,bn,be,mz,mn,me  
                                                                      internal
                                                                    digitizers 
Cambrian Regan SS 100'                                                & optical
...................................................................transmitters

Precambrian
Spavinaw Granite
Rb/Sr age 1277 Million Years
+/- 38 Million Years



Boreholes and vault at the Oklahoma Geological Survey near Leonard, Oklahoma.
Depths are in feet (each vertical line=100') and temperatures are in degrees
Fahrenheit. The boreholes and their contained seismometers were funded by
DARPA (Glasnost bore), LLNL/DOE (reworked Leonard Bore), and DEPSCoR/DARPA
(reworked Crosstimbers bore, drilled it 300' deeper, and cased and cemented
entire length). The Leonard bore is filled with water, the others are dry.

Guralp CMG1-TD seismometer and it's internal computer

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