Institute of Earth sciences

FLOWCHART FOR CLASSIFICATION OF ROCKS
AS IGNEOUS, SEDIMENTARY, OR METAMORPHIC

courtesy:-RICHARD M. BUSCH,DENNIS TASA

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The rock cycle—a conceptual model of how all rocks can be formed, transformed, destroyed, and re-formed as a result of environmental factors and natural processes that affect them. Environmental changes and processes affect these materials and existing rocks in ways that produce three main rock groups. Arrows show that a rock from one group can be
transformed to either of the other two groups, or it can be recycled within its own group. An idealized rock cycle path is
shown by the broad large arrows. But there are at least two other changes that each rock could undergo.
Igneous rocks form when any preexisting rocks melt to form magma/lava, which cools and solidifies (crystallizes or hardens into dense glass) into igneous
rock.Wherever rocks are weathered (chemically decayed or
broken apart) and roded (worn away), they produce sediment that can be compacted and cemented into sedimentary rocks. Whenever any rocks are subjected to intense heating and
pressure, they are deformed and transformed into metamorphic rocks.

courtesy:-RICHARD M. BUSCH,DENNIS TASA

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FORMATION OF IGNEOUS ,SEDIMENTARY AND METAMORPHIC ROCK

courtesy:-RICHARD M. BUSCH,DENNIS TASA

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SPATIAL SCALES OF OBSERVATION
USED BY GEOLOGISTS

courtesy:-RICHARD M. BUSCH,DANIS TASA

Pyrophyllite in grari mine located at village paalor

Fold in quartzite rock

Minor fault at babina

Fold formation