Did you ever asked yourself...

• From where are mountains and ocean?
• How do volcanoes split their magma?
• Why earth quakes?
• From where is spring water coming and why is it said "mineralized"?
• From where are aluminium, porcelain, ciment, steel...?
• What is absestos? And why is it dangerous?
• What about first trace of life on Earth?
• And dinosaurs? and Humanity? and after?
• Is the underworld coming on Earth together with the global planet warming?
• [...]

Even if it is resources for many things, we discover that Earth cannot be "subjugated" and that numerous "problems" arise : earthquake, tsunami, cyclon, volcanoes, landslides, unsettled weather, ocean rise, flooding...

Human is so nothing compared to the majestuosity of Mother Nature! We do not have to control this great Lady, at the risk of annoying her... Let's rather take time to understand her and let's learn how to live in equilibrium with her rules! All these questions have a common point and a way to understanding it...

GEOLOGY or EARTH SCIENCES...

A huge domain who covered everything from the center of earth to the very last particle of atmosphere (and even further with planetology and cosmology). My aims are to present you this world, step by step. You will need to be patient, the subject is gigantic and time is missing! Anyway it is quite impossible to achieved a complete resume on a unique website. Check my links for complementary information!

A major part of this website is dedicated to my past and present research, as also to my numerous pictures. Have a look!

SEDIMENTARY rock

Rock composed of organic, mineral or chemical precipitate rubbishes. This rock is deposited exclusively at the surface (or rarely sub-surface). Its volume on Earth is only about 5% of terrestrial crust, but it covers more than 75% of Earth surface, notably on ocean floor and lakeside (lake, small see) or fluvial (river) deposit without forgetting older sedimentary bassin (ocean, see or river now dry) or quaternary deposits (= recent).

Examples:
Limestone, dolomite, clay, marl, sandstone, radiolarite...

MAGMATIC rock

Rock coming from terrestrial mantle, the "viscous" layer situated under the crust (solid earth surface). We distinguish volcanic or igneous rocks from plutonic one. A volcanic rock is typically vitrous or made of fine minerals and a vitrous matrix. It is formed by solidification of a magma (molten rock) at surface or sub-surface. Plutonic rocks are mainly granite and gabbro, which are rocks formed in continental (granite) or oceanic (gneiss) crust at a depth from a few kilometer to several tenth of kilometer.

Examples (volcanic):
Rhyolite, trachyte, andesite/basalte
Examples (plutonic):
Granite, syenite, diorite/gabbro

METAMORPHIC rock

Rock undergoing a chemical and physical transformation at solid-state and at higher pressure and temperature than the one observed on Earth surface. This happens during burying of rocks deep into the Earth ("sliding" of an ocean under an other crust [subduction] or moutains building by collision of two continents [orogenesis]) or by re-heating of a zone (hot magma intrusion in "cold" terrestrial crust).

Examples*:
Marble (limestone or dolomite), paragneiss (mainly a grainstone mix with some clay minerals), orthogneiss (granite), metapelite (clay), amphibolite (basalte or gabbro)...

* In brackets the protolith, i.e. the rock BEFORE transformation