Stone Orgin

Granite Formation, Typical Concepts of Stone Origin Challenged by New Concepts

In the 2007 release of “Proceedings of the Geologist’s Association,” John Clemens challenged the typical viewpoint of stone origins. According to Clemens, all the concepts concerning a slow and gradual “granitic magmatism” formation are wrong. It’s a viewpoint that pops the image of magma balloons that is commonly associated with the origin of granite.

In the model concept concerning the origin of stone, six primary processes are involved in the creation of granite:

  1. Magma Production… Wherein source rock deep within the crust of the earth undergoes a partial melting
  2. Separation of Components… Wherein magma is separated from solid residue
  3. Magma Transportation… Wherein dykes of magma are carried to the upper crust of the planet
  4. Tabular Pluton… Wherein magma accumulates into tabular pluton, the sheetlike or table-shaped formations generated when pressure within the earth forces magma into and between cracks or sedimentary beds
  5. Magma Crystallization… Wherein the tabular pluton crystallizes into various stages of pligioclase feldspar and other minerals; typically plagioclase minerals occur as blocky to prismatic cleavable masses
  6. AND Final cooling wherein the pluton cools into rock types such as granite, quartz diorite, or another commonly described stone.

Stone Origin, The Conflict

For centuries geologists agreed that granites required millions of years to form. Yet even back into the 1700s, some few geologists argued against the accepted definitions (See papers by James Hutton (1726-1797) (1). How strange that the concepts of a long slow and violent birth should bring forth so much turbulence in the world of scientific understanding.

According to Clemens, the classic image involving balloons of magma (granitic diapirs) slowly pressing upward into the upper crust of the earth should be replaced by a more modern theory wherein the granite is produced in months rather than millions of years (2). In the Clemens vision of stone origins, narrow feeder dykes pulsing with magma thrust upward and rapidly grow into plutons. Thus rather than accepting images of a slow millions-of-years upward thrust that grinds to a halt by solidification, Clemens envisions a rapid process that can produce finished natural granite in as little as 60 days.

Right, wrong, or in-between, you decide. The Clemens argument seems plausible. And we suppose that only someone who is able to witness the entire process from start to finish can actually confirm or deny either side of the controversy.

We welcome your input be it yea or be it nay.

Origin of Granite Counters

Whether stone breaks into the crust within months or within millions of years, one thing is certain: stone origins concerning your counters are of more immediate concern. Mother nature may create the stone, but man does the mining and the shaping that works to craft a beautiful granite counter top.

Many exotic granite slabs for counter tops are imported from Brazil. Importers also include China, India, and Spain. Marble, on the other hand, typically comes out of Italy. If you are seeking brown granite, China offers a unique supply that rates high among many homeowners.

Typically delivery runs around thirty days for the material plus whatever time it takes your dealer to slice shape and polish the finished product. The full process runs as follows:

  1. Stone is extracted from the landscape
  2. Blocks are shipped to production house
  3. Using gang saws, the blocks are cut into slabs
  4. Preparation begins wherein the slabs are made ready for resin filling and over curing (Resin sealant corrects faults such as fissures and pits)
  5. The product is polished and buffed
  6. On some types of materials, the slabs include a plastic mesh designed to reinforce the natural strength of the stone.

1)James Hutton: The Founder of Modern Geology

2)Stone Origin: Catastrophic in its Suddenness

Common stone origins:

India…
  • Absolute Black Granite
  • Black Galaxy Granite… Originally from South Africa, but now commonly mined in India
  • Green Slate
  • Grey Sandstone
  • Red Migmatite
  • Roughly 150 plus total stone types.
Brazil…
  • Yellow Migmatite
  • Beige Travertine
  • Black Conglomerate
  • Roughtly 250 plus total stone origin
Other top suppliers…
  • China… 120 plus
  • Portugal… 90 plus
  • Spain… 90 plus
  • US… 55 plus.