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Figure 5.6A. (Top) Well-cemented multicolored breccia from solution pit in Pleistocene Key Largo Formation in Florida Keys. Note blackened angular lithoclasts. Also note in situ fracturing of black pebble. Laminated soilstone crust to left was part of solution pit lining. Soilstone crust is rusty brown in color. 5.6B. (Bottom) Same rock as in A after heating for one-half hour at 400°C. Note darkening of fragment shown by arrow. Soilstone lining at left has turned dark grey. (Note that in black-and-white photographs, rusty brown appears the same as dark grey, thus color change from A to B cannot be fully appreciated.) Notice that some darkened lithoclasts, such as one in center of specimen, became lighter upon heating.

Return to: Field Observations and Some Experimental Results | Discussion

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Last updated: 09 December, 2004 @ 01:21 PM(TJE)