[J&U2*. 

 LftSeAL 



ite'sUiw 



....SMtttL-SL 



I] 



f- 



Figure 3-5. ^4 — Lithologic log showing heading, grain-size graph, percentage porosity graph 

 (on right margin), core and casing symbols on left side of lithology column. B — 

 Drilling-time log plotted in minutes of time per foot of penetration. Also shown are 

 bit record, casing points, and zones of lost circulation. 



47 



