They are called geodes.
They're geodes.
Geodes. They can be found in some igneous rocks as well. They start as a hollow cavity created by a gas bubble or decaying organism. Mineral rich water seeps into the cavity and crystals form from the outside toward the inside.
I think you are describing a geode. They are generaly hollow and crystalline in structure
Grasses have hollow jointed stems.Grasses belong to family Poaceae. e.g. Triticum vulgare and Oryza sativa.Possession of hollow jointed stems is a specific character of grasses as in wheat and rice. These hollow stems help in providing O2 to roots for respirationspecifically in rice that grows in water. Impregnation of cell walls with silica makes cells rigid and rough and supports the plant.
Hollow spheres in a limestone rock could be called pockets or geodes.
A geode,(I bielive)
They're geodes.
geodes
grave
grave
Geodes
geodes
Geodes. They can be found in some igneous rocks as well. They start as a hollow cavity created by a gas bubble or decaying organism. Mineral rich water seeps into the cavity and crystals form from the outside toward the inside.
The Answer to this is mold. It leaves a hollow space in the fossil so you can see the formation.
I think you are describing a geode. They are generaly hollow and crystalline in structure
Yes, if they have the same volume.
No - they contain marrow