COIN TENS 
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Lower Silurian system of eastern Montgomery co. 
Introduction’ 0.x: ca Bee ne oa cn WE oni es Nest ene SO ee 419 
Historical sketch: 3.55. cel s Sace 222s cee cseee sue he oe oe eee ee eee eee 419 
Caleiferous;sandrock:... 222 ..cks ci. cence teat ances eee eee ee 419 
Birdseye limestone. 2.2.6 14-5 s-2geeeneee ee oes eet eee eee ee eee 421 
Black ‘river limestone’ [2 \,.52-..).. sak deccms spsiean ese n camels See eee 423 
‘Trenton limestone. S6<.ce oc 3 ov tiees toc ce mene celae eee tase ere eee ee 424 
Uties shialen © os oi esa Catia s Steiw odie oon Sate hein oa are on eye eee 426 
Hudsontriver shales 2 = oes yo ee owt Sena eee eee eee 428 
Topography sieiss 2... D5 ste a8ot =o ce ee ee 430 
Stratigraphy. 3s. ooo sn clits sae cee canvas eumpe ea edeepoabhe scm mel damages meted = 432 
North: ‘side iof Mohawk :;.<22 7. ss042 22.0 Sema en cena see eee 432 
Hlofitaan’ ferry fault .. 2:00. oc = sec ance ems seme Ry uals cauie seme siete eee 449 
South: side.of Mohawk © ccc Deccus cban'es scbhtoeea aes eae a ecne eo acne cane 457 
Gonelusions wicd <5. seks 3 Skate ed cn ore te ate ee eer ate ee ie ee ae ee 464 
Discussion of maps and SECtiONS ond Shs mee SE Le ete aL 467 
Stratigraphy of Mohawk valley anc Saratoga co. 
Mohawk valley:Gc5. soogh othe n seats Bia dae ee ee oe ree ee 469 
Sections at; Ingham: Mills\::: .. i. ccencoew ace dae des ate seat Saree eee 469 
Schoharie creek. sections... 5... .sdeacy. Cee eon eee eee ee eee 470 
Bean hill section s+... 26 fcSae) sue see heen See Bee ee 471 
Swartstown creek: sections < oo.20cceben ca dee sam & cee Co ee ee ee eee 472 
Amsterdam sectton.as ons seo lond mater eRe ne ban tee eae SE re HE 474 
Pattersonville section cs ui. join« Jee Se oe ee ee oe ee oe ee eee 474 
Mofhnan. fault |. ooo hive diccan cake pee ene mee ne ee ee = Se eee 475 
ORLOLORMIORNTY a a in o's xin vem « Shs Cosmic cients eee ernest rine oa diate steiaee see 476 
Rock @ity falls ‘section. ... <..:6 oi tcacs be eee inn tek eee eee 476 
Saratoga (Springs sections .... 00s ssqasne Aes Oat obeeieetn Milas edd ae ip mt eine mo 
Glens Falls sections... « s0cchs u'seacne open ree Eaiwabiss a uan' oe ome 480 
