Figure F7. Close-up photograph showing the bottom contact of the dark-brown clay of Unit 3 and the underlying fining-upward black sand of Unit 4 (interval 200-1223A-2H-1, 14-36 cm).

Figure F7. Close-up photograph showing the bottom contact of the dark-brown clay of Unit 3 and the underlying fining-upward black sand of Unit 4 (interval 200-1223A-2H-1, 14-36 cm).