...R. P. Riddihough; R. G. Currie; R. D. Hyndman Abstract The Dellwood knolls are two small topographic features on the ocean floor off northern Vancouver Island. They have been proposed as a spreading centre connecting the Explorer ridge to the Queen Charlotte fault and the location of a triple...

... southwest of the southern end of the Queen Charlotte transform fault. SeaMARC II imagery reveals a parallel transform fault, an extension of the Revere–Dellwood Fault, bordering the southwest end of the Dell wood Knolls and terminating at the southwest end of the Tuzo Wilson Seamounts. This transform-fault...

... on the east. At its northern end spreading commenced in the Dellwood Seamount area less than 2 m.y. ago. Normal faults which cut the sediment and volcanic basement in the valley between Dellwood Knolls, and high heat flow here and in adjacent Revere-Dellwood fracture zone, suggest the valley is a median...

... the Explorer ridge, the Dellwood Knolls, and the Tuzo Wilson volcanic field as part of the spreading system, requiring up to three triple junctions in the region. New SeaBeam bathymetry interpreted with existing regional data sets indicate that the Dellwood Knolls and Tuzo Wilson volcanic field...

...Brian L. Cousens; R. L. Chase; J. -G. Schilling Abstract Forty-two fragments of young, fresh basalts, dredged from the Explorer Ridge, Paul Revere Ridge (Fracture Zone), and Dellwood Knolls, have been analysed for 34 major, minor, and trace elements, and 87 Sr/ 86 Sr ratios have been determined...

...EARL E. DAVIS Abstract Spatially limited, strong acoustic reflectors, interbedded with turbidite sediments, appear in abundance in the region flanking the Dellwood Knolls, northeast Pacific, where turbidite sediments nearly cover a newly formed spreading center near the continental margin off...

...-trench-fault” triple junction just north of Vancouver Island, marks the locus of right-lateral transcurrent motion between the Pacific and North American plates. En echelon spreading axes (Juan de Fuca Ridge, Explorer Ridge, Dellwood and J. Tuzo Wilson Knolls) offset by short transform segments form...

... centre. On the basis of these and other data, Winona basin is proposed to extend northwestward as far as an imaginary line drawn landward from the trough between the Dellwood Knolls. In order to test this proposal and delineate in detail the total sedimentary section, high resolution reflection studies...

... located by three ocean bottom seismometers confirm that the boundary between the Pacific plate and the Explorer plate (the northern extension of the Juan de Fuca plate) at present lies along the Sovanco fracture zone, the Explorer ridge, and the Dellwood Knolls. The epicentres of earthquakes in this area...

.... Currie R. G. Hyndman R. D. (1980) . The Dellwood Knolls and their role in triple junction tectonics off northern Vancouver Island , Can. J. Earth Sci. 17 , 577 - 593 . Rohr...

... , Can. J. Earth Sci. 14 , 384 - 396 . Riddihough R. P. Currie R. G. Hyndman R. D. (1980) . The Dellwood Knolls and their role...

... of the terrace the morphology is most subdued and Carbotte et al. (1989) , Braunmiller and Nábĕlek (2002) , and Rohr (2015) showed from geomorphology, seismicity, side‐scan data, and seismic reflection profiles the complex transition zone to the Tuzo Wilson and Dellwood Knolls. Rohr (2015) points out...

...: 10.4095/133936 . Davis E. E. Currie R. G. Sawyer B. ( 1987 b). Acoustic imagery, Wilson/Dellwood Knolls , Geological Survey of Canada, Preliminary Map 11‐1987 , 1 sheet, doi: 10.4095/133937 . Dehler S. A. Clowes R. M. ( 1988 ). The Queen Charlotte Islands refraction...

.... The Queen Charlotte Sound fan (B) has developed in tectonically complex terrain, notably recently active volcanic seamounts such as the Dellwood Knolls ( Riddihough et al. 1980 ; Rohr and Furlong 1995 ), and the southeastern extension of the Queen Charlotte Transform Fault. The fan reduces 1000 m...

.... In this model, the magmatic centers of the Tuzo Wilson and Dellwood Knolls are not true spreading centers but the result of localized extensional regimes in the zone between the two strands of the transform ( Fig. 10 ). Consequently, we place the northern edge of the offshore plate system at the southern end...

... for magnitude recurrence calculation; and major plate boundary faults and fracture zones of the Juan de Fuca Ridge system: QCF, Queen Charlotte fault; WK, J. T. Wilson Knools; DK, Dellwood Knolls; WDS, Wilson-Dellwood Shearzone; RR, Revere Ridge; ER, Explorer Ridge. southeast and the Juan de Fuca ridge system...

... ). No fossils have been found in the Snowbird or Great Smoky groups. Shale and limestone of the Walden Creek Group contain acritarchs ( Knoll and Keller 1979 ) which do not provide diagnostic age control ( Knoll and Swett 1985 ). Large C-shaped soft-bodied metazoan fossils at the top of the Walden Creek Group...

... for aftershocks (derived from the Global Centroid Moment Tensor catalog; Ekström et al. , 2012 ; see Data and Resources ). DE, Dixon Entrance; TWS, Tuzo Wilson seamounts; DK, Dellwood Knolls; TF, Transition fault; FF, Fairweather fault; PSF, Peril Strait fault; CSF, Chatham Strait fault. The color version...

..., Winona Basin; CSZ, Cascadia Subduction Zone; JR, Juan de Fuca Ridge; WV, West Valley; MV, Middle Valley; SFZ, Sovanco Fracture Zone; EX, Explorer Seamount; ER, Explorer Ridge; RFZ, Revere Fault Zone; DFZ; Delwood Fracture Zone; DK: Dellwood Knolls; TW; Tuzo Wilson Seamounts; QCF, Queen Charlotte Fault...