Describe how seafloor spreading occurs along the Juan de Fuca ridge

Seafloor spreading occurs due to addition of crustal materials underneath plates. Volcanoes brings up lava from below and create new seafloor.

Explanation:

When axial erupted, the boiling hot water is moved out of the volcano followed by great amount of hot lava fills the gap between pacific plate and the jaun de fuca plate creating a new seafloor

The magnetic products that are brought up under the plates form new seafloor along the jaun de fuca ridge.

The shallow rift valley is associated with each jaun de fuca segment is 50 - 200m deep and 1-8km wide.

for the points

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !