A yacht voyageLetters from high latitudes; being some account of a voyage, in 1856, in the schooner yacht "Foam," to Iceland, Jan Mayen, and Spitzbergen . , reducing its varied surface toone vast blackened level. One of two things then occurred: either the vitrifiedmass contracting as it cooled,—the centre area of fiftysquare miles burst asunder at either side from the adjoin-ing plateau, and sinking down to its present level, left thetwo parallel Gjas, or chasms, which form its lateral bound-aries, to mark the limits of the disruption; or else, whilethe pith or marrow of the lava was still in
A yacht voyageLetters from high latitudes; being some account of a voyage, in 1856, in the schooner yacht "Foam," to Iceland, Jan Mayen, and Spitzbergen . , reducing its varied surface toone vast blackened level. One of two things then occurred: either the vitrifiedmass contracting as it cooled,—the centre area of fiftysquare miles burst asunder at either side from the adjoin-ing plateau, and sinking down to its present level, left thetwo parallel Gjas, or chasms, which form its lateral bound-aries, to mark the limits of the disruption; or else, whilethe pith or marrow of the lava was still in a fluid state, itsupper surface became solid, and formed a roof beneathwhich the molten stream flowed on to lower levels, leavinga vast cavern into which the upper crust subsequentlyplumped down.^ The enclosed section will perhaps help you a little tocomprehend what I am afraid my description will havefailed to bring before
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Keywords: ., bookauthordufferin, bookcentury1800, bookdecade1880, bookyear1883
