Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 79
contact with them,the clays will be changed to slate, the limestone will have assumed acharacter more likemarble, while thesandstone will bevitrified. This is^^ exactly what hasbeen found to bethe case, wherever^^^ the stratified rocks have been penetrated by the melted masses from be-neath. They… … America the Old World 53 may often be traced in dikes, which are only the cracksin rocks filled by materials poured into them at someperiod of eruption when the melted masses within theearth were thrown out and flowed like water into anyinequality or depression of the surface around. Thewalls…
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