LITHIFICATION & DIAGENESIS

UNCONSOLIDATED SEDIMENT TURNS INTO HARD SEDIMENTARY ROCKS

LITHIFICATION :

ROCK FORMS AS SEDIMENT IS COMPACTED BY BURIAL SO WATER OR AIR ARE FORCED OUT OF THE PORES (SPACES) BETWEEN GRAINS

GRAINS ARE THEN CHEMICALLY CEMENTED TOGETHER BY MINERALS DEPOSITED BY FLUIDS IN PORES

DIAGENESIS:

MINERAL CHANGES OCCUR DUE TO INCREASING TEMPERATURE AND PRESSURE

FOR EXAMPLE, FLINT IS CHEMICALLY PRECIPITATED SiO2 CHANGED TO CRYSTALLINE ROCK