Sed-paleogeography: How to reconstruct paleoenvironments SPECMAP 8180 Layer of time history of environmental fluctuations E 3 3 Figure 8.4 Halite pseudomorphs on the bases of sand- stone beds from a thinly interbedded sandstone/siltstone sequence: larger pseudomorphs with stepped'hopper sedimentary sequences faces Proterozoic, Independence Fjord Group, N. Green-Layer of time & history of 1 environmental fluctuations 2 3 1 2 3 3 2 1 sedimentary sequences 2 1 0 -1 -2 -3 SPECMAP 18O 800 760 720 680 640 600 560 520 480 440 400 360 320 280 240 200 160 120 80 40 0 Age(kyr) Sed-paleogeography: How to reconstruct paleoenvironments