... with synthetic data and applied to real data from the Waltham Canyon fault, California. The two techniques are applied best in combination, to design filters and to generate complementary images of steep faults. The geometry of near‐vertical faults is important in understanding the tectonic behavior...

...Fig. 2. —Structure sections across Waltham Canyon fault zone. For location of sections see Figure 1 . ...

... by a fault. The relation of the areal distribution of the Cretaceous deposits to the New Idrea and Waltham Canyon faults shows that the non-appearance of the Cretaceous beds on the surface is not due to their having been dropped down along these faults, but that they were folded against them...

.... Sivaram, Ajay Paul, Sandeep Gupta, Rajagopala Sarma, and V. K. Gaur Seismic Imaging of the Waltham Canyon Fault, California: Comparison of Ray‐Theoretical and Fresnel Volume Prestack Depth Migration Klaus Bauer, Trond Ryberg, Gary S. Fuis, and Stefan Lueth Rupture History of the 2008 M w  7.9...

.... It is taken farther northwest in Sec. 7, T. 21 S., R. 13 E., in the first canyon south of Dogwood Creek, a western side canyon of Waltham Creek. Fig. 1. —McLure sandstone unconformably overlying massive sandstone beds. TABLE I MCLURK SHALE, SEC. 8, T. 24 S., R. 17 E. Etchegoin (Pliocene...

... , undifferentiated Miocene; Tvq , Lower Miocene; Tmm , Middle Miocene; Tmu , Upper Miocene; Tp , Pliocene; Tu , Tulare (Lower Pleistocene). Lines of sections are shown in Figure 24 . The Waltham Canyon fault zone is developed 47 along the steep flank of an asymmetrical anticline, and is complicated...

... Formation ranges in thickness from 400 to 800 ft. Waltham Formation .—This Cenomanian formation formerly was known as “Lower Waltham” ( Anderson, 1941 ). It conformably overlies the Long Canyon Formation and consists predominantly of dark-gray fissile shale with very thin beds of medium- and fine...

... understanding of the Guizhou karst system is centered on karst hydrology, controlling factors, landforms, geomorphology, and karst-related carbon sinks ( Liu et al., 2007 ; Waltham, 2009 ; Yuan et al., 2016 ; Zeng et al., 2016 , 2020 ). However, the influence of fault and fracture systems on the development...

... faults to establish underground routes through to the single resurgence of Keld Head on the valley floor. The dominant cave pattern is to drop down a joint to reach one of the many shale beds in the upper part of the limestone succession ( Waltham 1970 , 1971 ). There the cave heads north, therefore up...

... throughout the area but are more clustered updip. Tower karsts and hills are located between canyons, valleys, and sinkholes. The modern Lijiang River drainage system on top of the karsted formation in south China is a good analog ( Purdy and Waltham, 1999 ). For a more detailed description of the paleokarst...

... ), and is interpreted as the landward-vergent scarp of the frontal thrust fault of the Cascadia accretionary prism. Willapa Canyon, the main canyon for this study, lies north of Astoria Canyon and marks the boundary between Nitinat and Astoria submarine fans ( Fig. 1C ). Grays, Quinault, Guide, and Willapa Canyons...

.... It was believed that the outfall of the pipe was into a nearby canyon where heavy flows of muddy water were seen. Essentially, over a period of time the water escaping from the pipe caused erosion of the fine material by piping failure (referred to as pseudokarst by Waltham) in the volcanic deposits. The cavity...

..., in Geology of Carrizo Plains and San Andreas fault—guidebook : San Joaquin Geol. Soc. , p. 16 – 20 . Flynn , D. B. , 1963 , The San Benito—Waltham Canyon trough—possible oil province, in Geology of Salinas Valley and the San Andreas fault—Guidebook AAPG-SEPM Pacific Secs. Spring Field Trip...

...T. Waltham Abstract With few exceptions, the ground collapses that constitute the karst geohazard in engineering activity in limestone terrains are induced by human activity. Subsidence sinkholes, formed entirely within the soil profile, constitute the most widespread karst geohazard...

... of the Waltham Canyon fault, California: Comparison of ray-theoretical and Fresnel volume prestack depth migration : Bulletin of the Seismological Society of America , v. 103 , p. 340 – 352 , https://doi.org/10.1785/0120110338 . Burg , J.-P. 2018 , Geology of the onshore Makran accretionary...

... , Unwin Hyman , 601 p. Isler , O. , and Brasey , J. , 1992 , Doux de Coly: Spelunca , no. 45 p. 33 – 40 . Jameson , R.A. , 1985 , Structural segments and the analysis of flow paths in the North Canyon of Snedegars Cave, Friars Hole Cave System, West Virginia [M.S. thesis...