Hornfels is a fine-grained nonfoliated metamorphic rock with no specific composition. It is produced by contact metamorphism. Hornfels is a rock that was baked while near a heat source such as a magma chamber, sill or dike. The specimen shown above is about two inches (five centimeters) across.
Industrial Hemp Facts. Industrial hemp is a variety of Cannabis sativa and is of the same plant species as marijuana. However, hemp is genetically different and distinguished by its use and chemical makeup. Industrial hemp refers to cannabis varieties that are primarily grown as an agricultural crop.
Botanist and Cannabis expert Robert C. Clarke, writing for the International Hemp Association to Health Canada concerning Canada's new regulations, addressed this issue as follows: Although industrial hemp does contain trace amounts of THC, it is of no practical significance.ndustrial Hemp is defined as the plants and plant parts of the Cannabis plant, whose leaves and flowering heads do not contain more than 0.3 percent THC. It includes derivatives of the seeds such as oil and seedcake.