The cold water observed along the northern California coast in summer is mainly due to: upwelling .
here Upwelling is a process in which deep, cold water rises toward the surface replaces warm water from the surface.
Winds blowing across the ocean surface push water away. Water then rises up from beneath the surface to replace the water that was pushed away. This process is known as “upwelling.”
Upwelling occurs in the open ocean and along coastlines. The reverse process, called “downwelling,” also occurs when wind causes surface water to build up along a coastline and the surface water eventually sinks toward the bottom.
Water that rises to the surface as a result of upwelling is typically colder and is rich in nutrients. These nutrients “fertilize” surface waters, meaning that these surface waters often have high biological productivity. Therefore, good fishing grounds typically are found where upwelling is common.
I think that it would still just be an island. A peninsula is a landform surrounded by water that extends outward from the land. Imagine a green rectangle sticking out from the green oval you pictured. That rectangle would represent the peninsula. Therefore, dividing the island in half would not create any peninsulas. Hope this helps :)
A seismic interpretation s needed to understand the data that is generated from the earthquake waves to understand the subsurface observations. The seismic attributes like the amplitude, phase, wave frequency are used in interpretation but most of them are based on attributes of amplitudes.
Instantaneous frequency is used to determine the thickness in beds and recognition through the Subtle faults and the Stratigraphic pinch outs.
Seismic stratigraphy is another field that is based on the depositional bedding planes of the earth's rocks mass fixed in there geologic history. Various types of techniques exist in this framework <u>like flooding surfaces maximum flooding surfaces and the erosion surfaces.</u>
