88 SURFACE GEOLOGY. 
In Hooksett the kames are well shown for a mile north from Pinnacle 
pond. Several small ponds lie in the irregular hollows at the sides of 
these ridges. A well marked kame forms the east border of the high 
terrace west of Hooksett village and north-east from the Pinnacle, di- 
rectly east of which it could not be traced, but it reappears in a ridge 
on the south side of the road south-east of this quartz peak, thence turn- 
ing south-west towards the principal range of these kames, the direction 
of which seems to lie from north to south across Pinnacle pond. The 
locality of greatest irregularity in respect to shortness of ridges, inequality 
in height, variable course, and diverse material, found in this whole series, 
is the first half mile south from this pond. The scale of the map, how- 
ever, does not permit details to be shown. <A deep, winding hollow 
extends along the west side of the main ridge from within one fourth of 
a mile of the pond to a junction with the valley of a small brook nearly 
a mile south. A considerable portion of this hollow seems to be due to 
excavation; and for the next mile southward, where a single nearly 
straight ridge parallel with this brook constitutes all that we have of the 
series, the plain, which is 30 to 40 feet above the top of the ridge, has 
been so washed away that a wide hollow has been formed at both sides. 
Here the plain is sand or ordinary gravel, but the kame is mainly com- 
posed of the very coarse, water-worn gravel, which forms the principal 
portion of this series. This, however, is here found changing into coarse 
unmodified material, in which angular boulders, mostly of gneiss or gran- 
ite, two to five feet in their dimensions, occur almost as closely packed 
together as possible, with the gravel of the interspaces unmodified by the 
wearing of water. This forms a well defined narrow ridge, 25 to 40 feet 
high, which continues a sixth of a mile, or perhaps more, when it changes 
again to materials rounded and sorted by water, and wears the usual 
aspect of these kames. 
Next below this long single ridge the brook finds a passage to the 
river; and a very remarkable assemblage of kames, partly water-worn 
and partly angular, succeeds, covering an area half a mile long and one 
fourth of a mile wide, with short parallel or irregular ridges, most of 
which trend from north to south. These ridges are nearly level-topped, 
with intervening hollows at the north 30 to 40 feet deep. Near the mid- 
dle of the area a deep hollow runs transversely across the course of the 
