Table T2. Cumulative percent plot data.
Sample
depth (ft)
Clay and
silt (%)
Glauconite
(%)
Fine
quartz
(%)
Medium
and coarser
quartz sand
(%)
Sphaero-
siderite
(%)
Mica
(%)
Other
(%)
2.5 16.62 0 9 74 0 0 0
6.0 42.29 0 11 47 0 0 0
11.0 0.87 0 4 95 0 0 0
15.4 11.24 0 44 45 0 0 0
21.0 2.17 0 18 80 0 0 0
32.0 91.15 0 2 2 0 0 4
36.1 99.54 0 0 0 0 0 0
41.0 99.37 0 0 0 0 0 0
46.0 14.64 0 71 5 0 5 4
51.0 17.70 3 59 17 0 3 0
56.0 4.28 1 79 9 0 4 2
61.0 40.13 0 53 0 0 3 4
66.0 51.15 0 43 1 0 3 2
71.0 45.00 0 49 0 0 3 3
76.0 29.29 0 63 0 0 4 4
81.0 44.97 0 49 0 0 3 3
86.0 28.88 0 60 0 0 8 4
91.0 87.67 0 9 0 0 2 1
96.0 28.61 0 10 61 0 1 0
101.0 15.32 0 10 74 0 1 0
106.0 74.26 0 24 0 0 0 2
111.0 3.45 0 4 92 0 0 1
121.0 65.68 0 24 0 0 3 7
125.8 14.68 0 22 63 0 0 0
131.3 37.61 0 50 7 0 0 6
136.0 31.06 1 24 43 0 1 0
141.0 35.77 9 50 0 0 4 0
146.0 36.41 9 49 0 0 5 0
151.0 38.40 9 48 0 0 4 0
156.0 39.79 9 47 0 0 4 0
161.0 38.84 9 48 0 0 4 0
166.0 45.18 9 40 0 0 3 2
171.0 81.01 1 8 0 9 1 0
176.0 48.32 10 28 0 12 1 0
181.0 64.74 7 19 0 9 1 0
186.0 87.32 1 5 0 7 0 0
191.0 76.05 2 6 0 16 0 0
196.0 78.72 2 10 0 9 1 0
201.0 79.67 2 9 0 8 1 0
206.0 74.93 6 11 0 8 0 0
211.0 81.01 4 8 0 6 0 0
216.0 79.80 5 6 0 9 0 0
221.0 65.14 22 6 0 7 0 0
226.0 64.54 17 9 0 10 0 0
231.0 85.36 0 0 0 14 0 0
235.0 51.79 35 2 0 11 0 0
241.5 83.22 0 4 0 13 0 0
246.0 78.58 1 4 0 17 0 0
251.0 66.89 4 17 0 12 0 0
256.0 70.54 9 2 0 19 0 0
261.0 75.55 7 2 0 16 0 0
266.0 20.70 76 1 0 2 0 0
271.0 39.11 38 17 0 5 0 0
276.0 71.68 3 23 0 2 0 0
281.0 77.02 1 19 0 3 0 0
286.0 87.40 3 6 0 4 0 0
290.5 85.27 0 1 0 13 0 0
301.0 56.79 4 33 0 5 0 0
306.0 71.78 1 19 0 9 0 0
311.0 70.10 1 25 0 3 0 0
316.0 79.35 2 9 0 10 0 0
321.0 92.06 7 0 0 1 0 0
326.0 80.00 9 7 0 4 0 0
331.0 84.79 1 3 0 12 0 0
336.0 58.70 12 16 0 14 0 0
341.0 40.94 4 53 0 2 0 0
346.0 51.76 7 41 0 0 0 0
351.0 96.49 0 3 0 0 0 0
356.0 73.86 2 24 0 1 0 0
361.0 37.85 40 20 0 0 2 0
366.0 99.91 0 0 0 0 0 0
371.0 99.83 0 0 0 0 0 0
376.0 99.57 0 0 0 0 0 0
381.0 99.71 0 0 0 0 0 0
386.0 62.30 21 16 0 0 0 0
391.5 57.09 27 16 0 0 0 0
396.0 51.63 39 5 0 0 5 0
401.0 48.50 41 5 0 0 5 0
406.0 57.62 8 33 0 0 1 0
411.0 77.67 4 16 0 0 2 0
416.0 74.80 5 19 0 0 2 0
421.0 80.89 4 14 0 0 1 0
426.0 93.01 1 5 0 0 0 1
431.0 83.62 3 12 0 0 1 0
436.0 76.62 9 12 0 0 2 0
441.0 90.67 4 5 0 0 1 0
446.0 77.36 14 7 0 0 1 0
451.0 70.60 25 5 0 0 0 0
456.0 41.48 54 3 0 1 0 0
461.0 25.64 63 11 0 1 0 0
466.0 20.34 76 4 0 0 0 0
471.0 21.17 46 27 0 3 3 0
476.0 11.09 63 26 0 0 0 0
481.0 22.26 72 5 0 0 0 0
486.0 42.54 25 27 0 0 5 0
491.0 46.90 35 14 0 0 5 0
494.7 32.69 63 4 0 0 0 0
501.0 24.87 74 1 0 0 0 0
506.0 22.73 75 3 0 0 0 0
507.0 22.17 78 0 0 0 0 0
508.0 23.25 76 0 0 0 0 0
509.0 27.80 72 0 0 0 0 0
510.0 23.74 76 0 0 0 0 0
510.5 41.04 59 0 0 0 0 0
511.0 35.98 64 0 0 0 0 0
512.0 39.90 60 0 0 0 0 0
513.0 41.28 58 1 0 0 0 0
514.0 30.44 68 1 0 0 0 0
515.0 41.71 57 1 0 0 0 0
516.0 50.14 48 2 0 0 0 0
517.0 40.24 59 1 0 0 0 0
518.0 44.82 54 1 0 0 0 0
525.0 48.52 47 3 0 1 0 0
530.0 42.06 52 4 0 2 0 0
535.0 44.59 53 1 0 1 0 0
540.0 45.44 49 1 0 4 0 0
545.0 43.30 49 2 0 6 0 0
550.0 42.02 50 0 0 8 0 0
555.0 51.73 33 0 0 15 0 0
560.0 39.68 50 1 0 9 0 0
565.0 33.57 18 9 33 6 0 0
570.0 7.91 1 5 85 0 0 0
576.0 12.06 2 8 78 0 0 0
581.0 14.11 1 6 78 0 0 0
586.0 22.40 21 22 35 0 0 1
591.0 20.25 4 67 4 0 5 0
596.0 37.79 4 48 3 0 4 3
601.0 34.35 3 49 7 0 4 3
606.0 19.19 8 58 0 0 9 5
611.0 25.79 4 39 24 0 4 4
614.2 5.64 3 33 57 0 1 1
621.2 42.88 1 47 0 0 4 5
626.0 63.18 2 26 0 0 4 5
631.0 53.08 2 34 0 0 5 5
641.0 39.24 3 45 0 0 7 6
651.0 56.00 2 32 0 0 5 5
661.0 60.23 2 31 0 0 4 2
666.0 59.13 12 26 1 0 2 0
671.0 63.03 3 29 1 0 2 2
676.0 59.83 38 0 0 0 1 1
681.0 41.86 43 11 0 0 4 0
685.0 35.15 53 10 0 0 2 0
691.0 29.65 2 29 40 0 0 0
696.0 10.07 1 45 43 0 1 0
701.0 4.76 1 38 57 0 0 0
706.0 21.10 0 23 56 0 0 0
711.0 22.67 0 44 34 0 0 0
716.0 5.55 0 27 68 0 0 0
721.0 9.37 0 40 50 0 0 1
726.0 6.32 0 32 61 0 0 0
730.3 5.76 0 21 71 0 0 2
731.7 15.13 1 35 46 0 1 3
736.0 20.68 0 28 42 0 0 10
741.0 5.78 0 53 41 0 0 0
745.0 29.01 0 34 3 0 9 26
750.0 56.47 0 28 9 0 0 7
761.0 86.72 0 11 0 0 1 2
766.0 90.76 0 5 0 2 1 1
771.0 98.74 0 0 0 0 0 0
780.9 89.94 4 3 0 0 1 2
786.0 78.87 0 14 0 0 3 4
791.0 86.97 0 8 0 0 2 2
796.0 88.38 0 9 0 0 1 1
801.0 95.81 0 0 0 0 2 2
806.0 95.96 0 2 0 0 1 1
811.3 97.34 0 1 0 0 1 1
816.0 93.21 0 3 0 0 2 2
821.0 93.04 0 2 0 0 2 3
826.0 88.71 4 2 0 0 2 2
831.2 22.92 15 15 47 0 0 0
835.0 12.10 9 9 71 0 0 0
841.0 17.35 0 70 5 0 8 0
851.0 28.24 0 57 7 0 7 2
861.6 32.73 0 63 0 0 4 0
866.0 52.56 0 41 0 0 6 1
871.0 61.00 1 29 0 2 4 3
881.0 55.47 1 37 0 0 4 3
886.0 57.06 0 28 0 1 7 7
891.0 78.96 0 12 0 2 3 3
896.0 93.46 0 4 0 1 1 1
901.0 96.27 0 1 0 0 1 1
906.0 97.92 0 1 0 0 0 0
911.0 92.02 0 4 0 1 1 1
916.0 81.85 1 12 0 1 2 2
921.0 81.91 1 13 0 1 3 1
926.0 86.21 1 11 0 1 1 1
931.0 87.63 4 4 0 2 2 0
936.0 95.49 2 0 0 2 1 0
941.0 70.44 29 0 0 1 0 0
946.0 34.63 60 5 0 0 0 0
951.0 29.48 44 26 0 0 0 0
955.0 42.65 41 16 0 0 0 0
961.0 21.62 55 20 4 0 0 0
964.4 62.39 0 29 0 0 5 5
976.0 51.71 0 37 0 0 11 0
980.8 34.82 65 0 0 0 0 0
986.0 27.10 52 0 0 21 0 0
990.0 15.05 79 0 0 6 0 0
1001.0 93.20 0 3 0 0 2 2
1006.0 70.51 0 12 0 0 9 9
1011.0 70.04 12 8 0 0 6 5
1015.0 36.49 59 5 0 0 0 0
1021.0 40.70 9 45 0 0 3 3
1026.0 26.17 54 19 0 0 0 0
1037.8 28.04 35 36 0 0 0 0
1047.5 34.60 33 32 0 0 0 0
1050.3 58.65 23 18 0 0 0 0
1071.0 36.55 6 26 32 0 0 0
1076.0 11.66 0 52 32 0 4 0
1081.0 36.08 0 52 0 0 6 6
1085.4 14.10 0 65 8 0 6 6
1090.0 73.75 0 11 0 0 3 13
1093.0 40.21 0 47 5 0 3 4
1101.0 8.27 0 14 77 0 0 1
1106.5 34.24 0 55 10 0 0 0
1121.0 9.51 0 74 4 0 4 8
1126.0 14.16 0 86 0 0 0 0
1131.0 6.25 0 87 1 0 5 0
1136.5 85.17 0 11 3 0 1 0
1141.0 5.31 0 59 36 0 0 0
1146.0 11.05 0 51 28 0 3 7
1151.0 59.39 0 40 0 0 0 0
1156.0 46.32 0 37 17 0 0 0
1161.0 5.56 0 7 87 0 0 0
1166.0 16.82 0 82 0 0 1 1
1171.0 34.94 0 50 0 0 7 9
1176.4 21.40 0 56 0 0 8 15
1181.2 92.12 0 6 0 0 1 1
1185.3 89.41 0 6 0 0 2 3
1191.0 52.30 0 27 0 0 9 11
1196.0 14.50 0 81 0 0 5 0
1201.0 17.33 0 75 0 0 4 3
1204.0 19.05 0 67 4 0 9 1
1211.0 31.38 0 34 5 0 15 15
1216.0 5.38 0 12 82 0 0 0
1231.0 30.65 0 3 66 0 0 0
1241.0 42.03 0 56 2 0 0 0
1246.0 58.78 0 41 0 0 0 0
1251.0 96.87 0 1 0 0 0 3
1261.0 49.63 0 50 0 0 0 0
1266.0 17.70 0 81 1 0 0 0
1271.0 7.00 0 5 59 0 0 29
1281.0 8.28 0 18 73 0 0 0
1286.0 7.86 0 26 66 0 0 0
1291.0 55.63 0 38 0 0 6 0
1294.2 29.21 0 55 12 0 4 0
1301.0 38.68 0 48 0 0 13 1
1304.4 29.15 0 58 0 0 12 1
1311.0 43.83 0 48 0 0 8 0
1316.0 30.75 0 60 0 0 9 0
1321.4 39.03 0 55 0 0 4 2
1326.0 78.97 0 17 0 0 3 1
1330.6 96.15 0 1 0 0 1 2
1336.0 88.77 0 10 0 0 1 0
1341.5 96.56 0 1 0 0 1 2
1346.0 63.95 0 30 0 2 4 0
1351.0 94.32 0 2 0 0 1 2
1356.0 98.85 0 0 0 0 0 1
1361.2 98.15 0 0 0 0 1 1
1366.0 99.65 0 0 0 0 0 0
1370.7 97.93 0 1 0 0 0 1
1376.8 95.21 0 0 0 0 3 2
1381.3 99.44 0 0 0 0 0 0
1386.0 58.96 0 38 0 1 2 0
1390.7 87.10 0 9 0 1 2 1
1396.0 55.69 0 28 0 11 4 1
1400.8 75.56 0 20 0 1 3 1
1406.0 80.16 0 9 0 1 5 4
1411.9 85.39 0 7 0 0 4 3
1415.0 84.02 0 10 1 2 3 0
1421.0 53.98 0 40 0 1 5 0
1425.9 55.82 2 27 0 3 11 3
1431.0 38.17 0 53 0 5 3 0
1435.5 69.97 0 26 0 0 2 2
1441.0 94.19 0 3 0 0 1 1
1445.1 55.71 4 35 0 4 0 0
1451.0 97.09 0 2 0 0 0 0
1456.0 58.78 0 10 0 31 0 0
1461.0 98.83 0 1 0 0 0 1
1464.0 99.20 0 0 0 0 0 0
1471.0 83.58 0 12 0 0 1 3
1476.0 42.03 3 49 0 0 3 3
1481.0 98.49 0 1 0 0 0 0
1486.0 97.56 0 2 0 0 0 0
1491.4 93.10 0 6 0 0 0 0
1496.0 26.48 0 70 0 0 4 0
1500.7 13.19 0 85 0 0 2 0
1506.0 96.61 0 3 0 0 0 0
1510.9 99.76 0 0 0 0 0 0
1521.2 20.93 0 39 36 0 4 0
1524.7 17.33 0 63 20 0 0 0
1531.0 20.26 0 53 25 0 2 0
1534.7 75.76 0 24 0 0 0 0
1541.2 91.62 0 8 0 0 0 0
1551.0 83.47 0 15 0 0 1 1
1556.0 95.89 0 4 0 0 0 0
1561.0 82.89 0 1 0 0 0 16
1571.9 92.76 0 7 0 0 0 0
1576.0 73.69 0 22 0 0 1 3
1581.0 97.22 0 1 0 0 0 2
1586.0 93.43 0 3 0 0 0 3
1591.0 91.99 0 1 0 0 0 7
1596.0 64.12 0 32 0 0 4 0
1597.7 95.24 0 4 0 0 0 0

Notes: Percent silt and clay in each sample was quantitatively measured by weighing each sample before and after washing off the clay and silt. The weight of the remaining sand was compared to the weight of the original sample to calculate percent silt and clay. All other percentages were arrived at qualitatively by visually estimating the proportion of each constituent in the sand fraction (see "Lithostratigraphy").