How are stones with white lines formed? - Answers

Stones with white lines, often referred to as banded or layered stones, typically form through geological processes such as sedimentation and mineral deposition. These white lines can be composed of different minerals, often calcium carbonate or silica, that crystallize in layers over time. Changes in environmental conditions, such as fluctuations in water chemistry or sediment supply, can lead to the alternating colors and patterns seen in the stones. This phenomenon is common in sedimentary rocks, such as shale or limestone, as well as in some types of metamorphic rocks.