Chazy Group

Geology

Formations: unnamed (34), ?Aylmer (1), Aylmer (1), Crown Point (68), Crown Point? (1), Day Point (47), Day Point? (1), Laval (1), Valcour (65), Valcour? (1)

Lithologies: not reported (19), claystone (2), mudstone (1), "shale" (15), sandstone (5), lime mudstone (20), grainstone (23), "reef rocks" (11), framestone (2), "limestone" (156), dolomite (10)

Paleoenvironments: marine indet. (144), carbonate indet. (53), reef, buildup or bioherm (23)

Age range: Sandbian or 458.20000 to 452.80000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Chazyan471.3 - 457.3USA (New York) (42808 42809 42810 42811 56184 56185 56215 63301 63302 63303 63304 63307 63313 63316 89105 154577 164475 171704 171705 171706 171707 171793 171796 171797 171798 171817 171818 171820 171897 172142 172143 172144 172171 172180 172181 172182 172183 172184 172185 172186 172187 172188 172190 172193 172195 172196 172197 172198 172199 172205 172206 172220 172221 172222 172223 172224 172225 172226 172227 172228 172229 172230 172231 172232 172233 172234 172235 172236 172237 172238 172239 172240 172241 172242 172243 172244 172245 172246 172247 172248 172249 172250 172251 172294 172295 172296 172297 172298 172299 172300 172301 172302 172303 172304 172305 172306 172307 172308 172309 172310 172311 172312 172313 172314 172315 172316 172317 172318 172319 172320 172321 172322 172323 172324 172325 172326 172327 172328 172329 172330 172331 172332 172333 172334 172335 172336 172337 172342 172346 172347 172348 172349 172676 172690 172757)
Chazyan471.3 - 457.3USA (Vermont) (42814 63297 63323 63324 171795 171799 171800 171816 172202 172203 172207 172208 186174)
Chazyan471.3 - 457.3Canada (Ontario) (172189 172201 172204 172210)
Chazyan471.3 - 457.3Canada (Quebec) (80006 172191 172200 172209 172350 172351 172352 172353 172354)
Whiterockian471.3 - 457.3USA (New York) (102995 102998 102999 103000 103001 103002 103003 103004 103005 103006 103007 103008 103009 103010 103011 103012 103013 103014 103015 103016 103017 103279 103280 103282 103283 103284 103299 103300 103301 103302 103305 103309 103310 103311 103312 103313 103314 103315 103316 103317)
Whiterockian471.3 - 457.3USA (Vermont) (103275 103276 103277 103278 103281 103285 103286 103287 103289 103290 103291 103292 103293 103294 103295 103296 103298)
Marmor - Ashbyan471.3 - 449.6USA (New York) (89032 89094)
Sandbian458.2 - 452.8Canada (Ontario) (182453)
Ashbyan457.3 - 449.6USA (New York) (89040)