Foreword; states occasion for publication at this time.
Working Hypotheses; presents hypothesis of eruptive origin of crust of the earth, resulting in granitic continents, basaltic ocean beds, and isostatic equilibrium among them.
Permanency; quotes Dana on permanency of continents and ocean basins and poses problem of continental bridges.
Case in point; cites Isthmus of Panama and its relation to frame‐work of Caribbean.
Framework of Caribbean; summarizes the tectonic history during post-Paleozoic time, showing orogenic upthrusting of periphery.
Environment of Caribbean; describes surrounding masses and considers, but rejects suggestion that compressive forces might have acted centripetally.
Caribbean a dynamic basin; argues that orogenic upthrusting of framework has been due to expansive forces, originating within and under the Caribbean deep.
Continental linking; linking of North America with South America by Isthmus of Panama attributed to dynamic activity of Caribbean deep and interpreted as an illustration of the elevation of . . .