... folding are followed by an episode of less intense, more open F 3 folding (Bowes and Langer, 1968; Hall, 1968a, 1968b). In the Peekskill area, Ratcliffe (1968a, 1968b) and Mose and others (1976) have shown that the essentially undeformed 435-m.y.-old Cortlandt ultramafic complex (Long and Kulp, 1962...

...NELSON C STEENLAND; GEORGE P WOOLLARD Abstract This report is based on 185 gravity and magnetic stations established over the Cortlandt Complex and contiguous areas. The total area of the survey is approximately 75 square miles. The Complex consists of a group of basic igneous rocks near Peekskill...

...-striking seismic boundary BB′ between Stamford, Connecticut, and Peekskill, New York. Purple numerals denote the distance along the Ramapo zone. Figure 1. Known earthquakes of M ≥3.0 in the greater New York City–Philadelphia area from 1677 through 2006. Magnitude, m best , is m b Lg...

... are probably greater than 15 km. Thus, the possibility that these earthquakes may have occurred on the Ramapo fault cannot be overlooked. Since 1534 at least three earthquakes have been felt in or near Peekskill, New York. in 1878 an earthquake was felt over an area extending from Peekskill to Marlborough, New...

...DENNIS WEISS Abstract The ecologic and stratigraphic development of the lower Hudson River estuary during late Pleistocene time was reconstructed from foraminifers and pollen in cores taken from Peekskill, New York, to The Narrows of New York Bay. Sediments deposited in freshwater, brackish water...

...-transcurrent faulting is recorded by actual offset of distinctive units and by the megascopic fabric in mylonite zones. The total cumulative offset since the late Precambrian on these faults is unknown but could be large. Right-lateral displacement of 4 km is indicated for the Canopus Valley area. Intrusive...

...Alexander H. Phillips Abstract Several years ago a party of students on a field trip near Peek-skill collected some specimens of thomsonite, and I believe this is a locality from which it has not heretofore been reported. Locally it occurs two miles east of Peekskill and about five hundred feet...

...Louis Winkler abstract The area covered by this catalog is the region east of the Appalachians from the southern border of Virginia to the southeast tip of New York State. For the period 1850 to 1930, a total of 191 earthquakes were felt in the area. Of these earthquakes, 39 were damaging...

... to fall. This sedimentation pattern, in which a condensed interval merges with different sequence boundaries, is consistent with the stratigraphic record of the Atlantic margin back to the Paleogene and may be typical of sediment-starved margins. Figure 1. Hudson River estuary studied areas (boxes...

... Österberg, and one on mineralogists and collectors who have been active in the area by Jörgen Langhof. Personally, I found these two chapters very stimulating. The famous collection of Långban “unknowns” by the mineralogist and mineral dealer Gustaf Flink (1849–1932) is a fascinating story. The bulk...

...Figure 1. (a) Topographic map showing a mainshock (yellow star) and seismicity (open circles) across geological units from west‐northwest to east‐southeast: Catskills, Highland, Newark basin, and Atlantic Coastal plain. Ramapo fault trending northeast runs through the epicentral area toward...

...-grade metasedimentary tectonic blocks in the Willimantic fault just to the south of our field area yield a monazite U-Pb age of 403 ± 1 Ma and a monazite-garnet Sm-Nd age of 405 ± 13 Ma ( Getty and Gromet, 1992 ). This Acadian-age metamorphism was in the sillimanite (without muscovite) zone...

... on numerous seismic stations over an area of ∼800  km in radius in the Pacific Northwest, including USArray ( Hedlin et al. , 2010 ; Walker et al. , 2010 ). In this case, the majority of the observations were acoustic‐to‐seismic‐coupled waves recorded by seismometers resulting from either favorable...

... a P-T phase diagram in the system CaFMAS to provide estimates of the pressure and temperature conditions for the development of orthopyroxene + sillimanite and sapphirine + quartz assemblages in the Mg-Al granulite. Fig. 1 Geological map of the west Alldays area showing the location...

... (Spl) rimmed uniformly by sillimanite in a quartzofeldspathic band from Maduravada, Visakhapatnam area, Eastern Ghats, India. The bar at the lower right hand side represents 0.1 mm. From Anantagiri, Visakhapatnam district of India, Sen-gupta et al. (1990) reported a garnet-free association...

... of the latest earthquake was reported prior to 1926. The 1878 event reportedly was felt from Marlboro, New York (which is directly west of Wappingers Falls on the west side of the Hudson EARTHQUAKESTRIGGEREDBY SURFACEQUARRYING 687 River) to Peekskill, New York (40 km south of Wappingers Falls) with a felt area...

... really develop—his on geochronology, hers on granitization, both subjects being areas of intense controversy in which innovations in thought generated intense hostility. (Perhaps Ms. Lewis might some day write an account of that other controversy?) Then, as the story draws to its close, we encounter...