The Botany of Iceland - 01.12.1914, Page 23
PHYSICAL GEOGRAPHY
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Fúlilækur, which often has minor “glacier-torrents” that carrv down
ice-pieces and stones. On the east side of the southern lowlands,
Markarfljót flows into tlie sea; it rises in Torfajökull, but also
receives well-supplied feeders from Mýrdalsjökull; in the low land
it divides into four arms which enclose the largest delta-land of
Iceland, the so-called Landeyjar. Thjórsá, Iceland’s longest river
Fig. 2. The river Jökulstt á Sólheimasandi. A ford.
(200 km.) rises in Arnarfellsjökull, but receives about one-half of its
water supply from Vatnajökull through its tributary Tungná; Thjórsá
carries an immense volume of water and, in the cultivated district,
is in several places one km. or more broad; above its mouth it
forms an expansion or a saccate lagoon and is joined by a well-
supplied arm of Markarfljót, named Thverá. The third and most
westerly large river in the southern lowlands is Ölfusá which, for
the longest part of its course (until the mouth of tlie tributary river
Sog), flows under the name of Hvítá and issues from Hvítarvatn
near Langjökull receiving, botli on the plateau and in the cultivated
district, many large affluents from both sides. In the neighhourhood