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FOSSILS FOOTPRINTS, BURROWS, ROOTS. REPTILE BONES, PLANT IMPRESSIONS, BURROWS FOOTPRINTS, BURROWS, CLAMS, REPTILE AND FISH BONES, . ..... . . .... . PLANTS, POLLEN .. ... ARTICULATED FISH AND REPTILES, CONCHOSTRACANS, OSTRACODES, INSECTS. PLANTS, POLLEN LAKE LEVEL - + Van Houten cycle W. Manspeizer and Others LAKE LEVEL - + BED THICKNESS - Ccml 0 ~0.c % DESICCATION a CRACKS LAKE LEVEL I , compound cycles 2nd order 3rd order LAKE LEVEL - + Figure 22. Generalized Van Houten cycle and compound cycles. A. Generalized Van Houten cycle showing properties of the divisions and inferred lake level; gray zones represent red beds. Idealized cycle most closely resembles those in the Jurassic Towaco Formation of the Newark basin. T.O.C. stands for total organic carbon content. B. Hierarchical relationship between Van Houten cycle and generalized compound cycles with inferred duration and lake levels. The idealized sections are closest to cycles in the Triassic Lockatong and the Passaic formations.
ank 0 6 I I Post-Paleozoic activity Gwynedd power spectrum [time) 40.0 20.0 13.9 10.0 8.0 6.7 5.7 5.0 4.4 4.0 period x 1000 yrs c period x 1000 yrs RANK 6 - GWYNEDD T.O.C.% CARBONATED EUREKA Figure 23. Examples of power spectra of sediment fabrics from the Lockatong Formation of the Newark basin. Fabrics are ranked from 0, a massive fabric deposited in the shallowest, most ephemeral water, to 6, a microlaminated fabric (Olsen, 1986,1980b) deposited in the deepest lakes. Time is calibrated by the microlaminated beds, which are assumed to be varved. A. Measured section at Gwynedd, Pennsylvania, with the rank curve shown to its right. Gray areas represent red beds. B. Single Van Houten cycle from Gwynedd section. 17. T.O.C. stands for total organic carbon content. C. Power spectrum in time for entire Gwynedd section showing main periods of cycles; assumed sedimentation rate 0.24 mm/yr. D. Superimposed power spectra from four different nonoverlapping Lockatong Formation sections.
Page 1 and 2: The Geology of North America Vol. F
Page 3 and 4: Post-Paleozoic activity SIBERIAN Fi
Page 5 and 6: DETRITAL BASINS :'->: SALT BASINS 0
Page 7 and 8: similar orientations and/or lie alo
Page 9 and 10: Post-Paleozoic activity NEWARK BASI
Page 11 and 12: Strata within these Mesozoic basins
Page 13 and 14: Post-Paleozoic activity USGS LINES
Page 15 and 16: sic marine tongue was speculated to
Page 17 and 18: contours in red are over Jurassic d
Page 19 and 20: crust. A pronounced north-northeast
Page 21 and 22: for relative contributions from iso
Page 23 and 24: Post-Paleozoic activity CULPEPER LI
Page 25 and 26: the basins and also corresponding w
Page 27: tons (1963), Thayer and others (197
Page 31 and 32: the north side of the basin. Accord
Page 33 and 34: - 46' - 42O Post-Paleozoic activity
Page 35 and 36: activity was initiated. The initial
Page 37 and 38: percent pyroxene (chiefly augite),
Page 39 and 40: have formed under higher conditions
Page 41 and 42: lines an elongated north-south patt
Page 43 and 44: Several studies of the intrusions w
Page 45 and 46: 0 100 200 300 Miles ^ Figure 27. Ma
Page 47 and 48: tomac Formation. They also report t
Page 49 and 50: REFERENCES CITED ' Post-Paleozoic a
Page 51 and 52: Galton, P. M., 1976, Prosauropod di
Page 53 and 54: - , 1988, Triassic-Jurassic rifting
Page 55 and 56: Bulletin, v. 95, p. 1176-1 187. Res

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