56 Sypney H. BALL: 
of coal of 2 distinct ages. In 1869—70 Capt. KoLDEwey') found coal 
associated with horizontal micaceous sandstone on Hochstetter’s Pro- 
montory on the east coast of Greenland in 75°20’ north latitude. He 
believed this to be of Глаз age. KoLDEWEY also found float upon Kuhn 
Island in the same region. Later Млтновзт?) found coal in place at 
the latter locality in horizontal sandstone of Middle Jurassic Age. 
(Middle Dogger horizon). On the east coast coal also occurs at Sabine 
Island in Tertiary strata capped by basalts, a series similar to that 
of Disco Island. 
Asbestos. 
Asbestos was one of the first economic minerals reported from 
Greenland, by Hans EGEDE, as early as 1738 (“A Description of Green- 
land”). With the enthusiasm of a promotor, he informs us that it is 
common and that there “are mountains of it”. Davip Crantz (1765) 
also says there is “plenty in many hills”. 
Small lenses of asbestos occur in fractures in a number of the dunite 
masses. They are of no economic importance, but that occurring at 
the head of Sarkak’s Kangerdluarsuk fiord (see page 38) is perhaps 
worthy of description. The straight asbestos fibre aggregates forming 
the central part of the lense reach a length of two feet, and are sur- 
rounded by asteriae and irregularly oriented aggregates of silicious 
asbestos fibres. Octahedra of secondary chromite are associated part- 
icularly near the edges of the better grade asbestos. Although the 
asbestos fibres wrap around these, the chromite is approximately of 
an age with the asbestos. The asbestos is evidently an alteration of 
the dunite, presumably formed by meteoric waters. 
Various reports also indicate the presence of asbestos in rocks, 
which are presumably in part metamorphic limestone. 
Muscovite. 
Davip CRANTZ (“The History of Greenland”, London 1767, р. 55, 
Translation from original edition published in 1765) states that white, 
black and gray mica occurs “but not in such large panes as to make 
windows out of as they do in Russia”. 
Muscovite, although not a common constituent of the pegmatites, 
occurs at several places in fair-sized books. On Songok mountain at 
the head of Isortuarsuak fiord, muscovite, with a little interstitial white 
1) The German Arctic Expedition of 1869—70. Capt. Koldewey, Translated 
by Rev. L. Mercier, London, 1874, p. 428. 
2) Млтновзт: Bidrag till nordöstra Grönlands geologi. Geol. Ебгеп. i Stock- 
holm Förh. Bd. 23. 1901, р. 277—80. 
