Geology is the scientific study of the Earth’s history including its rocks, and the internal and external processes that form and shape them. The Earth first formed and has been subsequently shaped by countless series of geological events that have occurred over an immense time span. Rocks are formed and are altered by numerous processes including ejection from volcanic eruptions, burial by layers of sediment, squeezing by mountain building and crushing by meteorite impacts. Every overlapping event is recorded in the rock record – the rock’s minerals. The ultimate role of a geologist is to piece the pages of a rock’s history together by identifying and decoding both the visible and hidden recorded features of each geological event. It is an awe inspiring and humbling task that requires an understanding and expert application of chemistry, physics and mathematics.
“I find geology a never-failing interest…..it creates the same grand ideas respecting this world which astronomy does for the universe” Charles Darwin
A mineral is a naturally formed inorganic solid. It is a homogeneous mixture of a defined and consistent combination of elements. These elements are organized into a crystal structure that is repeatedly ‘built’ as the mineral grows in size. The specific combination of elements that make up a mineral, and the organization of these elements into a geometric structure, give the mineral its colour, texture, hardness, and lustre. The formation of a mineral is controlled by complex interactions defined by chemistry and physics. These interactions are dependent on the composition of the substance(s) the mineral is forming in, and the heat and pressure at which the mineral grows.
A rock is a solid material that is a collection of minerals. Some rock are made up of one mineral such as sandstone or limestone, other rocks, such as granite, contain numerous minerals. A mineral grows in very specific conditions and it records a small snapshot of time. A rock forms over a longer time span and is affected by a range of changing conditions over the course of its evolution. Each mineral in a rock records progressive changes in composition, heat and pressure. For example, minerals in a granite record what was initially a hot magma, that cooled over time and eventually solidified into a rock.
NATURAL ENERGY & HEALING POWER
The Healing Power of Nature Energies and healing powers….more to come here