At some points the limestone has been dolomitized; near Bonsall it has been converted into a granular silicified rock. [Please select]
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The tiponi is a ceremonial object about 18 inches long, consisting of feathers set upright around a small disk of silicified wood, which serves as its base when set upon the altar. [Please select]
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_] Sometimes it happens that shells or other small objects imbedded in limestone have been dissolved and replaced by silica, and in such cases it is possible to eat away the enveloping rock with acid and leave the silicified casts. [Please select]
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