This is consistent with variation controlled mainly by individual trees and local lithological variations. The evidence comes from lithological and structural records. The range is made of different lithological units. A group is a set of two or more formations that share certain lithological characteristics. The formation is divided into three informal units based on broad but distinct lithological characteristics. Crude distribution in the trap is affected by lithological variation. There are 875 lithological units of granite. Into three lithological units, the Nuvvuagituq Greenstone Belt is divided. In lithological composition studies, lab and field spectroscopy of proximal and remote sensing can help. Two lithological units (formations) occur near the boundary. The period Upper Givetian till Frasnian witnessed pronounced lithological differences and increased sedimentation rates. In the Karoo Basin, the Dwyka Group is known by two distinctive lithological facies. The lithological nature of Tora Bora is predominantly metamorphic gneiss and schist. The Haynesville Shale is a lithological heterogeneous, often organic-rich, mudstone. From upstream to downstream, the following lithological units occur in the catchment.