Renovations include masonry work, new roofing and window work. A capitol idea Type 27 wheels are for metal and masonry work in sizes ranging from 3-9 in diameter, and Type 28 wheels are specially shaped for flat or corner grinding, and are available in 7 and 9 diameters.
Karst is a type of landscape where the dissolving of the bedrock has created sinkholes, sinking streams, caves, springs, and other characteristic features. Karst is associated with soluble rock types such as limestone, marble, and gypsum.
It was this sulfuric acid that dissolved the limestone forming the caves. Either way, because the soluble limestone is partially dissolved and carried away, these are a type of solutional cave. Less common solutional caves are formed in other types of rock like chalk, marble or gypsum. Often limestone caves are named caverns.