1. 1What is the nature and geologic origin of the bottom contact of Unit 2? ocean 2. 'lJ'llhjg.T is coal not found in wells A and B, whereas two coal seams are found on well E? Not below sea level 3. 1l."llells A and E are {'1'}? holes, socalled because they produced no petroleum. But the others produce petroleum. An oil pool is penetrated in well E from FSEI feet to 650 feet, in well (3 from 550 down to SUE] feet, and in well D from T512] down to Bill) feet. Sketch and label the outline of the oil pools on the cross section and explain wh],r the oil was trapped there. 4. 'lJ'llhjg.T is there no oil in either welli or well E? Oil is blocked