PHYSICAL GEOGRAPHY 



207 



Fulilaekur, which often has minor "glacier-torrents" that carry down 

 ice-pieces and stones. On the east side of the southern lowlands, 

 Markarfljot flows into the sea; it rises in Torfajokull, but also 

 receives well-supplied feeders from Myrdalsjokull ; in the low land 

 it divides into four arms which enclose the largest delta-land of 

 Iceland, the so-called Landeyjar. Thjorsa, Iceland's longest river 



* *'- 3 v * 



Fig. 2. The river J6kuls:'i a Solheimasandi. A ford. 



(200 km.) rises in Arnarfellsjokull, hut receives about one-half of its 

 water supply from Vatnajokull through its tributary Tungna; Thjorsa 

 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 Markarfljot, named Thvera. The third and most 

 westerly large river in the southern lowlands is Olfusa which, for 

 the longest part of its course (until the mouth of the tributary river 

 Sog), flows under the name of Hvita and issues from Hvitarvatn 

 near Langjokull receiving, both on the plateau and in the cultivated 

 district, many large affluents from both sides. In the neighbourhood 



