in HrHll.L AND NKKSON KIVKKS. 25 C 



pebbles at the bottom, ovoi-Jaid l>y iiiiioly t'ee( of saiwl and <;ravel. On First Limestone 



the same side of the river, at flie foot ot tlie rapid itself, 100 fret of the "^" ' 



hard drift clay, whieli here shows uneven joints with rusty surtaees, 



rest upon twenty feet of butf-eolou red fossiliferous d<>l(»iiiili' in nt.'arly 5^,y^^'i'l'-"prou.«« 



horizontal beds. It is shaly at the base, but at the top some of the^"'"""''' 



beds are tw(» feet thiid<. These hold tlinty and white chalky nodules. 



A eliti', twenty feel hiu^h, of u^royish-buH" dolomite, motth'd with yellow, 



runs along the edge of the rapid on the other side of (he river. Among 



the fossils observed here was an Ortlioreras two and a-half feet lonjx and . , , 



six inehes in diameter. On the south-east side, just below the Seeo?ul ^^'^'^ ^p"'- 



Limestone Rapid, nine miles above the tirst, a elitl', twelve feet high, 



at the edge of the rivei-, is formed of horizontal beds of crumbling but!" 



and greyish dolomite. At about a mile below this locality these be«ls 



were obsei-ved to be slightly undulating. At the Thinl i^iniestone j,,;^,, , j^j^. 



Rapid the rock is exposed in horizontal beds at the foot of the clay ■""•"^''^"''''^* 



bank along the south-east side of the river, and consists ot bluish-grey, 



drab and butf, somewhat arenaceous dolomite. Near the foot of this . 



' A renacbous 



rapid a considerable stream, which 1 took to be the Limestone River, '^"•'"n'^c. 

 enters on the oj)posite side. 



For the next eleven miles the river is very swift, and then a i-aj)id, 

 two miles wide and full of knobs and liitle ridges of gneiss, begins, and 

 continues for tive miles, or to the Twelve-feet Chute already men- 

 tioned. This might be appro])riately termed the Broad Rapid. In Broad Rapid, 

 going from the lowest of these rajiids to the othei*, the banks on 

 both sides diminish from a heii^ht of about one hundred feet at '''."'[""•■/i" '" 



neifrht ot banlis 



the former to about tift}- or sixty at the latter; yet the surface of o^er river-bed. 

 the ground probably slopes in the same direction as the i'ivei", the siopc of river- 

 descent in the latter being apparently greater than would be accounted 

 for by the difference in the altitude of the baid<s, supposing the tops 

 of the latter to be horizontal. On the north-west side, the clay bank 

 is (juite continuous and almost bare all the way to within a mile of 

 the Twelve-feet Chute, a distance of (►ver sixteen miles by the river. 

 Neai- the Third Limestone Rapid the bank was observed to be more or 

 less distinctly stratified throughout its whole height. On the opposite 

 side, the upper ])art, and sometimes its whole de])th, cijnsisls «>f 

 gravel and .sand. 



Alotig the above interval between the rapids, ledges of the dol.unite 

 crop out from beneath the banks here and thei-e on l)oth sides. The 

 last exposure is on the south-east side at the bottom of the Bioad (tive 

 miles) Rapid. Here it is finely arenaceous, of a mottled light '»b»«t*h- •jYoml^""'' 

 grey C(jlor. and holds some of the same fossils as those found further 

 down the river. The fossils collected at the thi'ee liimestone Rapids 



