Reptiles Prepared October, 2010


       


Second Contribution

to the

Studies on the Cambrian Faunas

of

North America

by

 
Charles Doolittle Walcott
United States Geological Survey

Bulletin of the USGS #30

1886

Titlepage

October, 2010.

Electronic Edition Copyright © 2010 by Dr. David C. Bossard

Download Acrobat PDF (97.2 Mb)

CONTENTS.


Titlepage to the Series  003

Titlepage to this Report  005

List of Plates and Illustrations 007

Introductory Observations  011

REVIEW OF THE STRATA AND FAUNAS 012

GEORGIA FORMATION. 013  014  015  016  017  018  019

Section p.016
Figure 1: Georgia Section


STRATEGIC RELATIONS OF THE GEORGIA TO THE POTSDAM SERIES.  020  021  022  023

ST. LAWRENCE VALLEY. 024  025  026  027  028

Section p.025
Figure 2: Ideal Section from the Adirondacks  cast over the line of the Georgia Section.



NEWFOUNDLAND.  029

NEVADA. 030  031  032  033  034  035  036  037

Section p.031
Figure 3: Eureka Section

Section p.037
Figure 4: Wasatch Section



UTAH.  038  039

CORRELATION OF SECTIONS. 040  041  042  043 044

Section p.042
Figure 5 - Grand Canyon Section.


TABLE OF THE MIDDLE CAMBRIAN FAUNA. 045  046  047

SUMMARY OF FAUNA. 048

STRATIGRAPHIC POSITION OF THE FAUNA. 049

GENERAL PALEONTOLOGIC CHARACTERS OF THE FAUNA. 050  051  052  053  054  055  056  057  058
Plantae, Spongiae, Hydrozoa, Echinodermata, Brachiopoda, Lamellibranchiata, Gasteropoda, Pteropoda, Crustacea, Poecilopoda,

SUMMARY OF THE CAMBRIAN FAUNAS OF NORTH AMERICA. 059  060  061  062

CLASSIFICATION OF NORTH AMERICAN CAMBRIAN ROCKS. 063  064

ON THE USE OF THE NAME TACONIC. 065  066  067  068  069  070

ACKNOWLEDGMENTS. 071


DESCRIPTION OF THE MIDDLE CAMBRIAN FAUNA


FUCOIDAL REMAINS, TRAILS OF ANNELIDS, ETC.

SPONGIAE.  072  073  074  075  076  077  078  079  080  081  082  083  084  085  086  087  088  089

PROTOSPONGIA. 090  091  092  093

ECHINODERMATA. 094

BRACHYOPODA. 095  096  097  098  099  100  101  102  103  104  105  106  107  108  109  110  111  112  113  114  115  116  117  118  119  120  121  122

LAMELLIBRANCHIATA.  123  124

GASTEROPODA. 125  126  127  128  129  130

PTEROPODA. 131  132  133  134  135  136  137  138  139  140  141  142  143  144  145

CRUSTACEA. 146  147  148

POECILOPODA. 149  150  151  152  153  154  155  156  157  158  159  160  161  162  163

RELATIONS OF THE GENUS TO OTHER GENERA. 164  165  166  167  168  169  170  171  172  173  174  175  176  177  178  179  180  181  182  183  184  185  186  187  188  189  190  191  192  193  194  195  196  197  198  199  200  201  202  203  204  205  206  207  208  209  210  211  212  213  214  215  216  217  218  219  220  221  222

DESCRIPTION OF A PTEROPOD FROM THE UPPER CAMBRIAN. 223  224  225

INDEX.  226  227  228  229  230  231  232  233  234  235  236  237  238  239




PLATES.

#
Click for plate at 100 ppi
DESCRIPTION
01


Plate at 300 ppi

description
Spongiae
Ethmophyllum profundum
L'Anse au Loup, Labrador
Middle Cambrian
also Plate 2, Fig. 3; Plate 4 fig. 3
 084
02


Plate at 300 ppi

description
Spongiae
Fig. 2 Leptomitus zitteli.
Parker's Quarry, Vermont
Middle Cambrian Hyalouema
showing silicious spicules
natural size
 089

03


Plate at 300 ppi

description
Spongiae
Archaeocyathus atlanticus
Archaeocyathus billingsi

04


Plate at 300 ppi

description
Spongiae
Fig. 1 Ethmophyllum Whitneyi
Silver Peak, Nevada
Middle Cambrian
 081
05


Plate at 300 ppi

description
Spongiae
Ethmophyllum rensselaericum
ridge East of Troy, NY
Middle Cambrian, Georgia Formation
length 0.3"
085
06


Plate at 300 ppi

description
Echinodermata
Eocystites longidactylus
Also Plate 5, Fig. 3.
Chisholm mine, MN
natural size
094

07


Plate at 300 ppi

description
Brachyopoda
Fig. 1 Lingulella caelata, 2x
ridge East of Troy, NY
Middle Cambrian, Georgia Formation
095
08


Plate at 300 ppi

description
Brachyopoda
Fig. 1 Acrotreta gemma, 3x
Middle Cambrian
Pioche, Nevada
 098
09


Plate at 300 ppi

description
Brachyopoda
Fig. 4 Acrothele Subsidua
Middle Cambrian
Antelope Springs, Utah
 108
10


Plate at 300 ppi

description
Brachyopoda
Fig. 1. Obolella crassa
Middle Cambrian
Conglomerate Limestone
ridge East of Troy, NY
 114
11


Plate at 300 ppi

description

Fig. 1. Obolella chromatica
Brachyopoda
Middle Cambrian
L'Anse au Loupe, Belle Island, Canada
 112

Fig. 4, diplograptus simplex
Protospongia
Middle Cambrian, Georgia Formation
Parker's Quarry, Vermont 
 092
12


Plate at 300 ppi

description

Fig. 7 Salterella pulchella
Pteropoda
Middle Cambrian, Georgia Formation
L'Anse au Loup, Labrador
 141
13


Plate at 300 ppi

description
Pteropoda
14


Plate at 300 ppi

description
Pteropoda
15


Plate at 300 ppi

description
Crustacea
Protocaris marshi
"Oldest Phyllopod crustacean known
at the present time."
Middle Cambrian, Georgia Formation
Georgia, Vermont.
 148
16


Plate at 300 ppi

description
POECILOPODA
17


Plate at 300 ppi

description
Olenellus
18


Plate at 300 ppi

description
Olenellus gilberti
19


Plate at 300 ppi

description
Olenellus
20


Plate at 300 ppi

description
Olenellus
21


Plate at 300 ppi

description
Olenellus gilberti
Also plates 18-20
Middle Cambrian
 170

Figure 1

Figure 2
22


Plate at 300 ppi

description
Olenellus Thompsoni
Middle Cambrian
Parker's Quarry, Vermont
 167
23


Plate at 300 ppi

description
Olenellus Thompsoni
Middle Cambrian
24


Plate at 300 ppi

description
Figure 1a Mesonacis vermontana
Middle Cambrian, Georgia formation
Parker's Quarry, Vermont
 158

Figure 1b Paradoxides rugulosus
 162
25


Plate at 300 ppi

description
26


Plate at 300 ppi

description
27


Plate at 300 ppi

description
28


Plate at 300 ppi

description
29


Plate at 300 ppi

description
30


Plate at 300 ppi

description
31


Plate at 300 ppi

description
32


Plate at 300 ppi

description
33


Plate at 300 ppi

description