2

3

10

Web adventure: Frost at work

Frost shattered

rocks

17

gypsum

19

pyroxene hematite quartz

20

22

dissolution

calcite bicarbonate

Strat and Sed, Ch. 1 23

24

• Orthoclase (K) feldspar • Plagioclase (Na) feldspar

28

29

Mafic minerals Felsic mineralsolivine

Ca plagioclasepyroxene

Ca-Na plagioclaseamphibole Na-Ca plagioclase

Na plagioclasebiotite

orthoclase, muscovite, quartzincr

easi

ng st

abili

ty

30

31