414 Dodge and JBeecher — Occurrence of Upper 



Yinal Haven), the greater part of the rock between Southern 

 Harbor and Waterman's Cove is eruptive, probably porphyrite. 

 In many places it holds innumerable fragments of rock some- 

 what similar to itself, of earlier consolidation. The highest of 

 the several hills formed by the eruptive rock (145 feet above 

 tide), three quarters of a mile northwest of the village of North 

 Haven, is known as Ames's Knob. 



The fossiliferous strata lie immediately north of the area of 

 eruptive rock, occupying lower ground. They run about east 

 and west, with prevailing southerly dip, and have a thickness 

 of about six hundred feet. Their preservation at an accessible 

 level is due to the protection against glacial erosion afforded 

 by the more resistant eruptive rock. 



Fossils have been found at more than twenty different points 

 in the three quarters of a mile between the shore of Southern 

 Harbor and the road from North Haven village to Pulpit (or 

 Northern) Harbor. Between the road and Waterman's Cove 

 the beds are mostly covered; the outcrops have not been ex- 

 amined for fossils. Two miles farther east, dark bluish-gray, 

 brown-weathering limestone, like one member of the North 

 Haven series (J 17, L 17, O), and overlying quartzite cross the 

 western end of Stimpson's Island obliquely from northwest to 

 southeast, in a narrow belt between eruptive rocks. The lime- 

 stone there has yielded only an indeterminable brachiopod and 

 a crinoid disk. 



In recording the localities of the fossils collected, outcrops 

 along the shore of Southern Harbor are designated by the 

 letter "J"; those inland along the north side of Ames's Knob 

 are marked "' K " ; those along the west shore of the shallow 

 bay that opens into Southern Harbor northeast of Ames's 

 Knob are lettered "L" ; the point that projects into the head 

 of that bay is occupied by the eruptive rock, but is called "M " ; 

 the eastern shore of the same bay is indicated by "N" ; the 

 outcrop at the west side of the Pulpit Harbor road, near the 

 edge of the woods, by " O." The numbers run from south to 

 north ; that is, from higher to lower beds. 



The section on North Haven, beginning with the lowest 

 beds of the group, is approximately as follows : 



Feet. 

 Conglomerate containing pebbles of quartz, schist, etc., J 19, 

 concealed or absent elsewhere 12 



Concealed (J and L), measured on J ,_ 59 



Conglomerate with pebbles of quartz and of schist, sandstone, 

 a few layers of shale, L 22-19, dip S. 5° W., 80°, the 

 conglomerate fossiliferous in a few places. Coarse cal- 

 careous sandstone (fossiliferous) with alternating finer 

 calcareous beds, J 18, dip S. 19° W., 58° 16 



