Recently obtained airgun-sonobuoy wide-angle refraction and
reflection profiles provide data to study crustal velocities and
structures along the continental margin of northern California and
Southern Oregon.
In the thick sedimentary wedge at the base of the continental
slope, as many as five distinct layers can be seismically observed,
which range...
Natural radionuclides may be indicators for dense mineral
placers along marine shorelines. Relict beach and river deposits
occur in continental shelf sediments. These deposits result from the
reworking of beach sands by wave action during the Holocene Transgression.
Some dense, resistant minerals associated with placer
deposits are known to contain...
CTD observations were made in the Code region near Pt. Arena on the northern California coast at 39° N during 14-27 July 1982. The observations in the Code region included three repeated sections along the Central Line, two mesoscale surveys of the shelf/slope region, and an alongshore section over the...
CTD observations were made in the CODE region between Pt. Arena (39°N) and Pt. Reyes (38°N) during 20-24 April 1982. The observations were made along seven sections: Irish Gulch, Arena, North, Code-North, Code Central, Code-2 Central and Ross Lines, and along the fifty fathom contour. Maximum sampling depth was 1000...
CTD observations were made in the CODE region between Pt. Arena(39° N) and Pt. Reyes(38°N), during 1-4 August 1981. The observations included two repeated sections along the Central Line, one section along the North Line, and one section in the region of the Pt. Ross Line rur during previous cruises....
This study examined the foraminifera and the ecologic conditions
of the benthic environment of the Oregon shelf and the uppermost slope
(75-550 m depth) between 143°45' N and 144°40' N. Seasonal collections
monitored the near-bottom marine environment and the sedimentary
substrate at 16 stations. The foraminiferal benthic fauna was
examined...
The distribution of surface sediments on the northern Oregon
continental shell is characterized by a nearshore sandy facies and an
outer shelf muddy facies, separated by a mid-shelf zone of mixed
sand and mud. Currents which have been measured at 130 centimeters
above the bottom indicate that the distribution of...