Geoscience Reference
In-Depth Information
Current-formed ripples
10 cm
10 cm
(i) plan view
(j) cross-section
Note:
Asymmetric profile and relatively simple internal geometry of the inclined surfaces that build up as the
ripple migrates.
Wave-formed ripples
10 cm
(l) cross-section
10 cm
(k) plan view
(m) Cross-section of climbing wave-formed ripples
Note:
Asymmetric profile, bifurcating crests,
complex internal geometry
Wave-formed ripples with current
Lenticular [l] and flaser [f] bedding
l
f
(o) cross-section
Tidal bundles
(n) cross-section
Complex wave-formed ripples formed within
wave-base where there was also a dominant
current. Note also the clay drapes.
(p) cross-section
Note:
Laminae are in multiples of seven and either widely
spaced (spring tides) or closely spaced (neap tides).
Figure A6.17
Continued
