HERMA:Nr BEACHES NEAR GAKDAR. 353 



gravel and sand extending thence 30 rods southward, 1,217 feet, with 

 descent of 15 or 20 feet on each side. 



Continuing beyond the Middle Branch of Park River, this highest 

 beach is well developed in a broad ridge ruiniing due north through the 

 west part of section 4, Lampton, with its crest at 1,202 to 1,208 feet. On 

 the east the surface falls 30 or 40 feet, and more slowly beyond, while 

 toward the west a descent of 10 feet is succeeded by a flat surface of till, 

 which rises slowly from the foot of the beach ridge to a swell at the height 

 of 1,215 to 1,225 feet, a half mile away, forming the east boundary of the 

 Golden Valley. This beach is sand and gravel, with pebbles up to 6 inches 

 in diameter. About half of them are limestone; nearly all of the remain- 

 der are Archean granite, gneiss, and schists; scarcely one in two hundi'ed 

 is Cretaceous shale. Through the west edge of section 33, Gardar, the 

 elevation of this excellent beach ridge is 1,202 to 1,205 feet, and in the 

 southwest edge of section 28 and the middle of the east edge of section 

 29, 1,202 to 1,197 feet, decreasing in height and size northward. For a 

 half mile through the southwest quarter of section 33, a slight secondary 

 beach ridge, 4 to 9 feet lower, lies about 30 rods east from the foregoing; 

 its crest is at 1,198 to 1,195 feet, sinking a few feet from south to north; 

 it is divided from the higher beach by a continuous depression about 3 

 feet deep. 



A very massive beach ridge, composed of sand and gravel, with peb- 

 bles and rock fragments, the largest only slightly waterworn, up to 6 

 inches in diameter, passes a few degrees west of north through the center 

 of section 20, Gardar, its crest in the south half of the section being at 

 1,208 to 1,215 feet, and in the north half 1,215 to 1,223 feet. On the 

 east is a descent of 20 to 30 feet within 25 to 40 rods, and on the west 10 

 or 12 feet from the highest part of the beach within 10 rods to a nearly 

 level area of till, 1,211 feet, which sinks 40 rods farther west to a long 

 slough, about 1,205 feet, parallel with the beach and a sixth of a mile wide. 

 Beyond this an undulating sui-face of till, partly covered with bushes and 

 small trees, rises to 1,250 or 1,275 feet within 2 miles, and then in smooth, 

 massive swells to 1,450 or 1,500 feet within the next 2 to 4 miles. These 

 are part of a plateau, thence rising more slowly westward, whose boundary 

 MON XXV 23 



