. Frost & fire : natural engines, tool-marks & chips : with sketches taken at home and abroad by a traveller. rom thesaddle, at a distance of about forty miles, at the point shown ;the map is copied from Gunlaugsons. Plan and elevationtogether show the shape and position of this local plan of the plateau is angular and irregular, the elevationshows a high plain with cliff and talus surmounted by a snow-dome. Snaefell is 5808 Danish feet high ; EjTiks Jokull hasnot been measured, but it is about as high ; it is nearly sur-rounded by lava-floods, which flowed out of other
. Frost & fire : natural engines, tool-marks & chips : with sketches taken at home and abroad by a traveller. rom thesaddle, at a distance of about forty miles, at the point shown ;the map is copied from Gunlaugsons. Plan and elevationtogether show the shape and position of this local plan of the plateau is angular and irregular, the elevationshows a high plain with cliff and talus surmounted by a snow-dome. Snaefell is 5808 Danish feet high ; EjTiks Jokull hasnot been measured, but it is about as high ; it is nearly sur-rounded by lava-floods, which flowed out of other the top Sntefell, Hekla, Myixlals Jokull, perhaps theOrsefa; hills about Eyafjord in the north, and Bardastrand onthe west—places about 200 miles apart—were seen on the 6thof August 1862, and the plain below looked much the sameas it did to Umbra twenty years ago. 42G DENUDATION—FROST-MARKS—LAND-ICE. From this lofty centre ](jwer sno-\v-tlonics like Ok Jokull,and hog-backed ridges like Lang Jokull, Ball Jokull, etc.,seemed mere rounded piles of snow, upon plateaux of bedded Plan and Igneous rock Fiom the seathese forms hadsuggested bubblesor domes oflava, coated withsnow ; a nearerview biirst tlbubl)l(S. From Reykholt, near tliesouth-west coast,up to Kalman-stunga below tliemountain, a valleygives a section lormany miles. Tlierock is bedded trap. Strata donot dip awa\-roni the moim-tains as they wouldif they were sourcesIVom which therocks tlowtd; theydip regularly at a ARCTIC CURRENT—FLOATS—ICELAND. 427 small angle towards the niouiitaius, but the slope of thecoimtiy is the other way. So even liere, in the workshop offire, some denudmg force has cut diagonally over the angle oftlic liruken crust. ()n all these low hills are signs of glacial denudation ; l)uttlie marks are so covered with lava and other volcanic debris,that their meaning is very obscure. One thing is plain—though numerous faults, dykes, and veins traverse these strata,there was no u
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