vp _ ~ * > 5 = —_ 
> 20 3 Te eg Ie eee 
te . Midas ett < Oe ret : 
*e ae ire diay ooo ge a2 er > 

410 DYNAMICAL GEOLOGY. [Boon IIL. 
moraines are brought together, and travel thereafter down the centre 
of the glacier as a medial moraine (Figs. 141, 142, and 143). — 






















































































































































































































Fig. 142.,—View oF THE MEDIAL MoRAINES AND GLACIER TABLES OF THE 
AAR GLACIER (AGASSIZ). 
In Fig. 143 the left lateral moraine (3) of glacier B unites with 
the right lateral moraine (2) of A to form the medial moraine 6, 
while the other moraines (1, 4) continue their course and become 
respectively the right and left lateral moraines (ac) of the united 

Fig. 143.—Mar or tHe Union of TWO GLACIERS, SHOWING JUNCTION OF TWO 
LATERAL INTO ONE MeprAn MoraIneE. 
glacier, A glacier, formed by the union of many tributaries in its 
upper parts, may haye numerous medial lines of moraine (Fig. 141), 
