Lawrence Vernon Blade 1970 <p>The Bushrod Island-New Georgia clay deposit near Monrovia, Liberia, consisted of interlensing clay and very fine to fine quartz sand; it was deposited in elongate subparallel troughs that had been eroded in coarse-grained sediments. The troughs are interpreted as abandoned stream channels on a former delta of the St. Paul River. The clay of the deposit is essentially a quartz-rich kaolinitic clay that has undergone sufficient weathering in the upper part of the deposit to redistribute iron and alumina.</p><p>The clay may be divided into three groups: an iron-rich group (A) in which total iron expressed as Fe₂O₃ averages 6.5 percent and ranges from 4.4 to 9.2 percent, a group (B) relatively lower in iron in which total iron expressed as Fe₂O₃ averages 2.7 percent and ranges from 1.6 to 7.4 percent, and a group (C) high in both organic material and iron in which total iron expressed as Fe₂O₃ averages 3.9 percent and ranges from 3.3 to 4.9 percent.</p><p>Potential indicated reserves for the three groups are estimated at 1,800,000, 5,300,000, and 470,000 tons, respectively.</p><p>Tests of the physical properties of the raw and fired clay indicate the clay is suitable for the following commercial uses: building brick, hollow tile, drain tile, roofing tile, quarry tile, flower pots, porous earthenware, low to intermediate duty refractory products, and probably stoneware and small diameter sewer pipe.</p> application/pdf 10.3133/ofr7029 en U.S. Geological Survey Geology of the Bushrod Island-New Georgia clay deposit near Monrovia, Liberia reports