Brillant as always! Many thanks!
Meanwhile:
Pacific Coast Region
Seaward of the slope are the expansive areas that underlie the oceanic habitat of the California Current, and include complex deepwater habitats at depths of 2,500–4,000 m (8,202–13,123 ft) and beyond: plains, channels, hills, sedimentary fans, volcanically active ridges, and seamounts.
The most conspicuous bathymetric features are seamounts, escarpments, and ridges. There are at least six sea-mounts and seamount groups within the EEZ, with depth of summits ranging from 770 m (2,526 ft) for Pioneer Seamount off San Francisco to 2,229 m (7,313 ft) for Tanney Seamount off Monterey Bay, California.
There are an additional seven seamounts located just outside the EEZ of the Oregonian Province boundary. The Gorda and Juan de Fuca Ridges, extending from northern California to Washington, also are significant physiographic features of the Oregonian Province. These two ridges are seafloor-spreading centers—sites where submarine volcanism brings hot magma to the surface of the seafloor and where hydrothermal vents (hot springs) are common.
The hydrothermal fluids support unique biological communities that derive chemical energy independent of sunlight.
https://swfsc.noaa.gov/publications/CR/2015/2015Yoklavich.pdf
Lake Superior
Lake Superior has a surface area of
31,700 square miles (
82,103 km2), which is approximately the size of South Carolina or Austria.
MapFight - Lake Superior vs California (US) size comparison
Lake Erie
OverlapMaps - Instantly compare any two places on Earth!
Published on Jul 27, 2018