Definition
A horst is an elevated block of land bounded by parallel faults. It forms when the land on either side drops down, leaving the central block uplifted. Think of it as a geological 'island' rising above the surrounding terrain. It's the opposite of a graben, which is a down-dropped block. Horsts are often associated with rift valleys and areas of tectonic activity. They can create dramatic landscapes and provide valuable insights into geological processes. Understanding horsts helps us understand how the Earth's crust moves and changes.