This would be called a cave.
A hollow or depression in the Earth's surface is known as a cavity or crater. These formations can occur naturally due to erosion, volcanic activity, or impacts, or they can be human-made through activities like mining or excavation. Cavities and craters can vary in size and shape depending on the geologic processes that formed them.
A natural hollow chamber in the Earth's crust is called a cave. Caves are typically formed by various geological processes, such as the dissolution of limestone by water, volcanic activity, or tectonic forces creating openings underground. These chambers can vary in size and shape, often containing unique geological formations like stalactites and stalagmites.
Hollow rocks are formed through a process called weathering and erosion. Over time, natural forces like wind, water, and ice wear away at the rock, creating hollow spaces inside. This process can be accelerated by factors like chemical weathering or the presence of cracks in the rock.
These hollow ball-like objects are known as geodes. Geodes form in sedimentary or volcanic rock cavities when minerals such as quartz, calcite, or amethyst crystallize inside the cavity over time. They often have a plain or dull outer surface, while the inside is filled with colorful crystals.
A geode forms in a pocket or hollow circular shaped opening in sedimentary or igneous rock. The opening could be created by a gas bubble, a rotted organism, or by other means. Mineral filled solutions seep into the opening and gradually form crystals from the hole lining inward. If the hole completely infills, it becomes a nodule. Because the minerals that form inside the pockets are often silicate, they are resistant to weathering. This means that the rock surrounding the pocket may not be as resistant to weathering as the geode pocket. Once the surrounding rock has weathered and eroded, what remains on the surface is the geode or nodule. Once an empty circular shaped hole it is now a rock formation unto itself.
Liar A place inhabited by a wild animal, often a cave or a hole in the ground. Cave A hollow or natural passage under or into the earth, especially one with an opening to the surface.
The central opening of a vessel is called the lumen. It is the hollow space within the vessel that allows for the passage of fluids, such as blood in blood vessels or sap in plant vessels.
a cavity,opening,or space within somethingwhen something is hollow t has nothing inside it (when a tree is hollow it is empty)
a cavity,opening,or space within somethingwhen something is hollow t has nothing inside it (when a tree is hollow it is empty)
Clover Hollow Natural Area Preserve was created in 2005.
The volume of a square hollow bar is calculated by multiplying the length of the bar times the width of the opening times the height of the opening ( inner dimensions ).
The area of Clover Hollow Natural Area Preserve is 101,171.41056 square meters.
The area of Hickory Hollow Natural Area Preserve is 1,027,901.5312896001 square meters.
cavity, hollow, mouth, opening
a valley
a cavity,opening,or space within somethingwhen something is hollow t has nothing inside it (when a tree is hollow it is empty)
The word you are looking for is "cave." A cave is a hollow opening or natural underground space that is typically large and found in hills, mountains, or the ground.