ELLIPSOIDAL LAVAS ON PRINCE WILLIAM S()UNI) 



47 



morphosed, so that they have almost completely lost their original 

 appearance. In other places, however, the lavas have been tilted, 

 with only slight folding and with little shearing, s<j that their original 

 character is well preserved. The term greensUmes has been com- 

 monly applied to these rocks, which are all diiibases or basalts. 

 The writer prefers the term "ellips<^;idar' to other commonly used 

 terms such as "spheroidal" or "pillow" lavas, for the forms arc 



ixo. 2. — t'ptilted tXXi^fe^A^aX flows, i»iw/wif«i^ irrt^uiiif b^^efe of the flow Uftmh. 

 Photo, by B. L, Johnson. 



most often eUips^jidal in cross-section (Fig. /;,. but in plan they 

 appear as more or less continuous bodies with irregukr bulges and 

 protuberances (Figs. 2 and 3). 



The best exp<^>sures for studying the ellips<^>i«^lal lavas were found 

 along the shore from two tr> four miles northwest of the village 

 of Ellamar, toward Rocky Point. There the waves have cut steep 

 sea cliffs which rise from the water's edge, often with no beach at 

 all, and the exposures are fresh and perfectly free from c/jvarm^. 



