Bulletin of the Geological Society of America . Figure 4.—Diaijram iUtistratii)fj the Rehition of Erosion to the Rise of a Mountain Block EXPLAXATIOX OF THE MOVEMEXT 297- material )3eneatli it has two important effects: First, the isogeothermalplanes are raised farther than they would be by the ex2:>ansion alone ofthe material of the ])lock under increasing temperature, for hot rock israised bodily into a position where its temperature is above normal andwhere its density tends to increase because of lowering temperature;second, the material added to the column from below to take the place
Bulletin of the Geological Society of America . Figure 4.—Diaijram iUtistratii)fj the Rehition of Erosion to the Rise of a Mountain Block EXPLAXATIOX OF THE MOVEMEXT 297- material )3eneatli it has two important effects: First, the isogeothermalplanes are raised farther than they would be by the ex2:>ansion alone ofthe material of the ])lock under increasing temperature, for hot rock israised bodily into a position where its temperature is above normal andwhere its density tends to increase because of lowering temperature;second, the material added to the column from below to take the place ofthe material of less density of the rising block may 1)e dense and there- fore tend to check the rise. It will be pointed out (page 298) that changein density may reverse crustal movement and cause a rise of the surfaceabout 1,200 feet under the conditions postulated. The tendency of theearth column to tloaf when its density is decreased makes possible amuch greater rise as the toj) is eroded, and Lambert shows in the accom-|)anying paj^er
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
