TABLE OF CONTENTS. 
XXXlll 
. Page. 
Rensselaer county. 425 
Localities where the rocks can be examined. 425 
Prof. Dewey’s section and description of rocks .. 426 
Description of the talcose and chloritic slates... 426 
Columbia county. Range in this county. 426 
Localities of particular descriptions. 426 
Vicinity of New-Lebanon, Canaan, Austerlitz, Hillsdale, Copake... 426 
Dutchess county. Winchell’s mountain and Chesnut ridge. 433 
Northeast, Pine-Plains, Amenia-. 434 
Stanford, Washington, Union-vale. 436 
Beekman and Fishkill. 438 
Theoretical considerations. Trains of evidence. 438 
CHAPTER VIII. 
METAMORPHIC ROCKS. 439 
Introductory remarks. 439 
Division of the subject. 440 
1 . Metamorphic rocks east of the Hudson and Highlands. 440 
2 . Metamorphic rocks east of the Highlands and Washington and Saratoga cos. 440 
1. Metamorphic rocks east of the Hudson and the Highlands . 441 
General characters and range of these rocks. 441 
(a) . Local details in Dutchess county. 442 
Economical application of the limestones. 444 
(b) . Altered Taconic rocks through the Highlands. 446 
Granular quartz, talcose slate and limestone of this range in Putnam and 
Westchester counties .. 446 
Talcose slate and limestone in Rockland county... 448 
Limestone, metamorphic in some places. 450 
(c) . Local details in Putnam county. 450 
(d) . Metamorphic rocks of Westchester and New-York counties. 451 
General description. 451 
Limestone of New-York county. 451 
Westchester county.... 45 1 
Ranges of limestone in Westchester county.... 452 
Local details of “ “ 453 
Copper and silver mines “ 456 
Rocks associated “ 456 
Anthophyllite rocks in New-York . 461 
Serpentine rocks in Putnam. 462 
Recapitulation and theoretical considerations. 463 
