Tag Archive for Flint

Flint (or flintstone) is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Inside the nodule, flint is usually dark grey, black, green, white, or brown in colour, and often has a glassy or waxy appearance. A thin layer on the outside of the nodules is usually different in colour, typically white and rough in texture. From a petrological point of view, “flint” refers specifically to the form of chert which occurs in chalk or marly limestone. Similarly, “common chert” (sometimes referred to simply as “chert”) occurs in limestone.
The exact mode of formation of flint is not yet clear but it is thought that it occurs as a result of chemical changes in compressed sedimentary rock formations, during the process of diagenesis. One hypothesis is that a gelatinous material fills cavities in the sediment, such as holes bored by crustaceans or molluscs…

Flint TX Skateboard Lessons!

Improve Your Skateboarding in a Week-Long Class

Skateboarding is a pastime activity, a work of art, or a method of transportation. Skateboarding has been designed and influenced by many skateboarders throughout the ages. A 2002 survey and study by American Sports Data uncovered that there were 18.5 million skateboarders in the world. 85 percent…

Flint MI Skateboard Lessons!

Discover Skateboarding in a 7 Day School

Do you want to learn how to skateboard?
Is the fear of falling keeping you from progressing? Discover all of the basic principles of skateboarding fast in a one-week camp. We will show you the principles of skateboarding like how to balance, push, turn, proper foot…