Major has found the corrupted name "Gombar Scheer" applied to the dangerous reefs and shoals left behind by this explosion.[295] Where volcanic action is declining geysers and boiling springs are apt to abound, as in Iceland; where it has become extinct at a period geologically recent, as in Auvergne and the Rhine country, its latest vestiges are left in the hundreds of thermal and mineral springs whither fashionable invalids congregate to drink or to bathe.[296] Now in Greenland, at the present day, hot springs are found, of which the most noted are those on the island of Ounartok, at the entrance to the fiord of that name. These springs seem to be the same that were described five hundred years ago by Ivar Bardsen. As to volcanoes, it has been generally assumed that those of Greenland are all extinct; but in a country as yet so imperfectly studied this only means that eruptions have not been recorded.[297] On the whole, it seems to me that the mention, in our Venetian narrative, of a boiling spring and an active volcano in Greenland is an instance of the peculiar sort--too strange to have been invented, but altogether probable in itself--that adds to the credit of the narrative. [Footnote 293: Daubeny, _Description of Active and Extinct Volcanoes_, London, 1848, pp. 307; cf. Judd, _Volcanoes_, London, 1881, p. 234.] [Footnote 294: "Ab Snefelsneso Islandiae, qua brevissimus in Gronlandiam trajectus est, duorum dierum et duarum noctium spatio navigandum est recto cursu versus occidentem; ibique Gunnbjoernis scopulos invenies, inter Gronlandiam et Islandiam medio situ interjacentes. Hic cursus antiquitus frequentabatur, nunc vero glacies ex recessu oceani euroaquilonari delata scopulos ante memoratos tam prope attigit, ut nemo sine vitae discrimine antiquum cursum tenere possit, quemadmodum infra dicetur." _Descriptio Groenlandiae_, apud Major, _op. cit._ p. 40.] [Footnote 295: _Op. cit._ p. lxxvi. See below, vol. ii. p. 115, note B.] [Footnote 296: Judd, _op. cit._ pp. 217-220.] [Footnote 297: My friend, Professor Shaler, tells me that "a volcano during eruption might shed its ice mantle and afterward don it again in such a manner as to hide its true character even on a near view;" and, on the other hand, "a voyager not familiar with volcanoes might easily mistake the cloud-bonnet of a peak for the smoke of a volcano." This, however, will not account for Zeno's "hill that vomited fire," for he goes on to describe the use which the monks made of the pumice and calcareous tufa for building purposes.]