The form of beach stones is a result of weathering out of the rock from which the stone originated and abrasion by the sea.
Sea abrasion will then to make the stone roundish and smooth, thus if there is a hole in it, it is either the result of the weathering process before the stone got to the sea or a shape inherent to the rock from the start. For instance in England, many beaches are made of flint pebbles where the flint comes form the eroded chalk cliffs. The flint in the chalk is irregular in shape and naturally has holes in it due to how it formed in the rock. Thus many pebbles will have depressions and holes in them when you find them on the beach.
The other possible origin for holes in pebbles (made of limestone) is the action of certain marine worms which secret acid to bore holes in rocks so that they have a home to live in. This too could be a possible reason for beach stones with holes but only if the stones are made of limestone.
When waves cut large holes into the fractured or weak rock along the base of a sea cliff, sea caves are formed. These are hollowed-out spaces within the cliff, created through the relentless force of the waves crashing against the rock over time.
This description is of a talus slope, which is a pile of broken rocks at the base of a cliff. Talus slopes are formed as rockfall debris accumulates over time. They help reduce erosion at the base of cliffs and provide habitat for plants and animals.
Cliffs retreat due to natural erosion processes such as weathering, gravity pulling rocks down, and the action of water and wind wearing away the cliff face. These erosion processes can cause the cliff to slowly retreat and change shape over time.
The term used for fallen disintegrated material found at the base of a cliff is "talus." Talus consists of rock fragments and debris that accumulate at the base due to weathering and erosion processes. This accumulation can create a sloping surface known as a talus slope.
the loose material either dissolves in the ocean (thats why the ocean is so salty), it settles on the bottom of the ocean and becomes sedimentary rock, or it washes up on sorelines and becomes sand.
When waves cut large holes into the fractured or weak rock along the base of a sea cliff, sea caves are formed. These are hollowed-out spaces within the cliff, created through the relentless force of the waves crashing against the rock over time.
scree
detrital slope
This description is of a talus slope, which is a pile of broken rocks at the base of a cliff. Talus slopes are formed as rockfall debris accumulates over time. They help reduce erosion at the base of cliffs and provide habitat for plants and animals.
In the UK the rock material your referring to is known as Riprap or rock armour.
A cliff retreat is a form of natural erosion. Rocks in the face of the cliff are broken down by wind and water (rain, waves, etc). The material in the cliff is loosened, and parts of the cliff face collapse. Eventually, an entire section of the cliff will fall into the sea, meaning that the cliff edge has retreated. The pace of cliff retreat is determined by the strength of the rocks in the cliff face, more than the cliff's height. It also most often occurs where the base of the cliff is continually being saturated by water, weakening the rock further.
At the bottom of a wave-cut cliff, you would typically find eroded rocks, sediments, and debris that have been removed from the cliff face by wave action. This material can accumulate at the base of the cliff, forming a rocky beach or platform.
Cliffs retreat due to natural erosion processes such as weathering, gravity pulling rocks down, and the action of water and wind wearing away the cliff face. These erosion processes can cause the cliff to slowly retreat and change shape over time.
wind blowing at the edge of the cliff AND waves pounding the base of the cliff will cause a cliff to collapse
Talus caves form when rocks pile up at the base of a cliff or slope, creating a gap between the rocks and the cliff face. Over time, erosion and weathering can widen and deepen this gap, creating a cave-like structure. Talus caves are typically found in areas with steep cliffs and loose rock material.
You would expect to find talus at the base of a cliff or steep slope. Talus consists of loose, fragmented rock debris that has accumulated from the erosion of the cliff or slope above. It often forms a slope of angular rocks and boulders created by gravity pulling the rock fragments downhill.
you cant cover the holes in your secret base.