RESEARCH· ·1970·

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of Glenopte1-is show considerable variation in size, pinnule characteristics, and other n1orphological details. Only G. splenclens, with frond widths of 20 em or n1ore, ttpproximates the Cutler specimen in size, but the pinnules o:f the 1\:ansas species are strongly auricled and have midribs only two-thirds as long as the pinnules. These and other contrasting features render it unlikely that the Cutler specimen is conspecific with GlenOJJte?'is SJJlenclens. In anticipation of any suggestion that the Cutler specimen is a new species of GlenoJJte?is, it should be ren1arked that Gle1W1Jte1·is apparently inhabited a restricted geographic area in 1(ansas, its limited range probably 11 function of environmental control; this circumstance was discussed by Read and l\1amay (1964, p. 1{16-1{18) in delimiting three Early Permian floral provinces. Gle1toJJte1is has not yet been recognized in the province of GigantoJJte?is, which contains 11 rich flora and is geographically interposed between the provinces of S~tJJaia and Glenopte1-is; this fact would seetn to emphasize the morphological evidence against assignment of the Cutler specimen to Gle1W1Jte1-is. 'Vhile some of the species of S~tpaia approach the Cutler specimen in size of pinnules, none possesses the combination of such features as the channeled rachis, abruptly tapering pinnules, and deeply constricted pinnule bases; thus we reject s~tJJaia as a generic repository for the Cutler specimen. The resemblances between the Cutler specimen and the Jnaterial of P1•otoblechn~m~ 1vongii illustrated by I:Ialle ( 1927, pis. 35-36) outweigh by far any_ other comparisons that might be made. The Chinese material possesses the same type of constricted or auriculate pinnule bases, decurrent laminae, strong 1nidribs, channeled rachises and other n1orphological features of the Cutler specimen. The frond of P1·otoblechn~t1n b1·adyi as demonstrated by the holotype has a particularly close resemblance to the specimen of P. 1vongii shown in 1-Ialle's figure 2, plate 36. The frond of the Cutler specimen, however, is somewhat 1nore compact, with 1nore closely spaced pinnules than the Chinese material; P. 1vongii is diagnosed by Halle (1927, p. 135) as having "distant pinnae", while those of P. b1·adyi tend to overlap. It is also possible that there are differences in details of the venation between the two species, but unfortunately this feature is not preserved in P. b1·adyi. P~rotoblechn~m~ b1·adyi is named for the late l\{ajor L. F. Brady, of the 1\{useum of Northern Arizona, in recognition of his interest in this study and his prepara.tion of: the specimens. MAMAY AND BREED Gen'ls SUPAIA White Bl13 The assignment to Supaia of incomplete fronds such as that in the Cutler collection is necessarily based largely on chai·acters of secondary importance, because this specimen is lacking in what White regarded as the main distinguishing generic feature-a dichotomously forked rachis. '~Thite (1929, p. 54) defined Supaia as having an equally bifurcate frond with once-pi1mate or pinnatifid lan1ina ; each side of the divided frond was supposedly asy1nn1etrical, with the outer pinnules 1nuch longer than the inner. 'Vhile the dichotomous division of the rachis is observable on several of 'Vhite's specimens ·and may -constitute a reha;ble generic feature, the degree of asymmetrical pinnule develop- . ment, as shown in vVhite's ( 1929, fig. 1) reconstruction of a frond of S~tpaia linea1-ijolia, is not convincingly borne out by the original specimens. Some of the specimens are too fragmentary to determine size relationships between pinnules on opposite sides of the same rachis ; some specimens show a slight degree of asym J?etry, while others apparently had equally developed pinnules. For this reason we are inclined to 1ninimize the importance of laminar asymmetry and base our identifications on other characteristics, chiefly size, shape, and distribution of pinnules. Supaia rigida D. White Figure 2D (cf. 'Vhite, 1929, pl. 17, 'fig. 1, 2) Des01-iption.-One specimen of this taxon is present in the collection; it consists of what appears to be the terminal part of a frond or the terminal part of one of the dichotomous divisions of the lamina. There is no evidence of asyn1metrical development of the frond, however, as the pinnules to either side of the rachis are virtually of equal length. The rachis is 10.0 cn1 long between its broken ends and about 3.0 mm wide at its broadest point; it is perfectly straight and gives the impression of considerable rigidity in life. There is nothing distinctive about the rachis, as it is completely lacking in surface ornamentation or indument. Fourteen pinnules, mostly complete, are attached to the rachis. The basal pinnules are inserted oppositely, while those toward the apex of the specimen are subopposite or alternate. They are widely spaced, with intervals of 1.0 em or more between adjacent pinnules. The basal ones are inserted at very broad angles to the rachis (approximately 75°-80°), but distally the angles of insertion decrease so that the terminal pinnules create angles of about 45 o.
B114 PALEONTOLOGY c .,;# I I ' ' lOcm E FIGURE 2.-Early Permian plant fossils from lthe Cutler Formation in Monument Valley, Utah; A-C, natural size; scale at bottom oif plate applies oillly to D and E. A. Undetermined plant fragmerut, poSJSibly coniferous, specimen P4.155. B, C. Callip,teris ( ?) sp. Fragments showing deeply lobed pinnules; B, specimen P4.153; 0, specimen P4.154. D. Sttpaia rigida 'Vhite. Heavy blacl{ lines indicate pinnule midribs; specimen P4.'151. E. 'Specimen of Taeniopteris sp., showing fragmentary shoot at bottom, with several leaf fragments either attached or oriented as though they were part of the same specimen. Ultimate venation indicated at upper right; specimen P4.152.
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CONTENTS GEOLOGIC STUDIES Petrology
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GEOLOGICAL SURVEY RESEARCH 1970 Geo
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B2 PETROLOGY AND PETROGRAPHY for bi
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B4 PETROLOGY AND PETROGRAPHY has be
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B6 PETROLOGY AND PETROGRAPHY. 32
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B8 PETROLOGY AND PETROGRAPHY TABLE
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BlO · PETROLOGY AND PETROGRAPHY EX
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GE,OLOGICAL SURVEY RESEA·RCH 1970
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B16 PETROLOGY AND PETROGRAPHY Sprin
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B20 PETROLOGY AND PETROGRAPHY Sigva
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B22 PETROLOGY AND PETROGRAPHY EXPLA
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B24 PE~ROLOGY AND PETROGRAPHY schis
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B28 PETROLOGY AND PETROGRAPHY sg•
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B30 PETROLOGY AND PETROGRAPHY Detri
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B32 PETROLOGY AND PETROGRAPHY place
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B34 PETROLOGY AND PETROGRAPHY 66 '
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B36 PETROLOGY AND PETROGRAPHY Post-
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B40 PETROLOGY AND PETROGRAPHY did n
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B42 PETROLOGY AND PETROGRAPHY Creta
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td :t 106'20' r--- 10' 106'00' 38'3
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B46 STRUCTURAL GEOLOGY FIGURE 4.-Vi
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B48 STRUCTURAL GEOLOGY FIGURE 6.-An
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B50 STRUCTURAL GEOLOGY clined slide
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GE,OLOGICAL SURVEY RESEARCH 1970 CA
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B54 GEOPHYSICS (1950), Domzalski (1
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B56 GEOPHYSICS STRATIGRAPHY AND LIT
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B58 GEOPHYSICS STRATIGRAPHY AND LIT
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B60 GEOPHYSICS value. A normal free
Page 67 and 68: B62 GEOPHYSICS Hammer, Sigmund, 193
Page 69 and 70: B64 110°45' GEOPHYSICS L I I \ "'\
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Page 73 and 74: B68 GEOPHYSICS A' San 0 p A c I F I
Page 75 and 76: B70 GEOPHYSICS lies occur over rela
Page 77 and 78: B72 GEOPHYSICS 36° 00' A' 40___./
Page 79 and 80: B74 GEOPHYSICS igneous massif is co
Page 81 and 82: B76 GEOPHYSICS A 50 Bouguer gravity
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Page 85 and 86: B80 GEOPHYSICS FIGURE 1.-Bouguell'
Page 87 and 88: B82 GEOPHYSICS J I 37·~~------~~--
Page 89 and 90: B84 GEOPHYSICS B 600 B' 500 400 (/)
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Page 93 and 94: EXPLANATION Pikes Peak • batholit
Page 95 and 96: DISTRIBUTION OF URANIUM IN URANIUM-
Page 97 and 98: B92 GEOCHRONOLOGY Fleischer, R. L.,
Page 99 and 100: B94 ECONOMIC GEOLOGY 103° 35' w 1/
Page 101 and 102: 'B96 ECONOMIC ·GEOLOGY 0 500 FEET
Page 103 and 104: B98 ECONOMIC GEOLOGY TABLE !.-Summa
Page 105 and 106: BlOO ECONOMIC GEOLOGY surface seems
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Page 109 and 110: B104 EJrucJh of the four samples wa
Page 111 and 112: B106 ECONOMIC GEOLOGY R. 56 E. R. 5
Page 113 and 114: B108 ECONOMIC GEOLOGY outcrop under
Page 115 and 116: BllO Brady, of the Museum of Northe
Page 117: Bll2 PALEONTOLOGY FIGURE 1.-ProtobZ
Page 121 and 122: B116 PALEONTOLOGY ments, the larges
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Page 125 and 126: B120 L xMH 'xE soo~~B_R~I __ T_I __
Page 127 and 128: B122 PALEONTOLOGY Tetrataxis sp. Te
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Page 131 and 132: Bl26 PALEONTOLOGY TABLE 2.-Ranges o
Page 133 and 134: B128 PALEONTOLOGY l
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Page 143 and 144: B138 PALEONTOLOGY core are m1ssmg,
Page 145 and 146: B140 PALEONTOLOGY death assemblage:
Page 147 and 148: Bl42 STRATIGRAPHY EXPLANATION l:.\.
Page 149 and 150: B144 STRATIGRAPHY ver. We do not in
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Page 157 and 158: B152 STRATIGRAPHY at a depth of 58
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Page 161 and 162: B156 STRATIGRAPHY REFERENCES Brown,
Page 163 and 164: B158 STRATIGRAPHY In what follows,
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llj ...... ~ TABLE 2.-Specific grav
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B166 TABLE 3.-Settling time for a 1
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Bl68 GEOMORPHOLOGY 74° 44° YERMON
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B170 GEOMORPHOLOGY have also been r
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B172 GEOMORPHOLOGY end of Long Isla
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GEOLOGICAL SURVEY RESEARCH 1970 DET
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~ooo ______________ B176 ANALYTICAL
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B178 terranes where the search for
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B180 Reproducibility Replicate anal
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B182 ANALYTICAL METHODS in the aque
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GEOLOGICAL SURVEY RESEARCH 1970 CHE
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B186 ANALYTICAL METHODS 3.31 percen
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Bl88 ANALYTICAL METHODS 3" 2%" Oute
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B192 GROUND-WATER RECHARGE I T I 14
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B194 GROUND-WATER RECHARGE Therefor
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GEOLOGICAL SURVEY RESEARCH 1970 PRE
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B198 GROUND-WATER RECHARGE the basi
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B200 GROUND-WATER RECHARGE t \ \)
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B202 GROUND-WATER RECHARGE Water is
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B204 GROUND-WATER CONTAMINATION rv
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B206 GROUND-WATER CONTAMINATION TAB
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B208. GROUND-WATER CONTAMINATION fa
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B212 SURFACE WATER plotted, and the
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B216 SURFACE WATER however, if the
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B218 SURFACE WATER TABLE 4.-Variati
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B220 RELATION· BETWEEN GROUND eral
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B222 -0.010 f -0.005 (i) RELATION B
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GEOLOGICAL SURVEY RESEARCH 1970 THE
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'B226 RELATION BETWEEN GROUND WATER
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B228 RELATION, BETWEEN GROUND WATER
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B230 RELATION BETWEEN GROUND WATER
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GEOLOGICAL SURVEY RESEARCH 1970 HYD
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B234 EROSION AND SEDIMENTATION side
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B236 EROSION AND SEDIMENTATION s·o
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B238 EROSION AND SEDIMENTATION Cont
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B240 EROSION AND SEDIMENTATION 2 3
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GEOLOGICAL SURVEY RESEARCH 1970 SPE
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B244 GEOCHEMISTRY OF WATER REFERENC
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B246 HYDROLOGIC TECHNIQUES The upla
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B248 HYDROLOGIC TECHNIQUES type in
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GEOLOGICAL SURVEY RESEARCH 1970 ,,.
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B252 formula may also be useful in
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GEO'LOGICAL SURVEY RESEARCH 1970 CO
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B256 randomly fluctuating component
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B258 HYDROLOGIC TECHNIQUES 1.0 ~ Qj
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~ B260 HYDROLOGIC TECHNIQUES 1-3, f
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I B262 HYDROLOGIC TECHNIQUES REFERE
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,' B264 Page Gravitational sliding,
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., / )
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RESEARCH· ·1970·

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