| Sedimentary
Structures |
 |
|
 |
|
Wave
Ripples
(oscillatory flow)
|
Current
Ripples
(unidirectional flow)
|
Interference
Ripples
(plan view; two different oscillatory flow regimes)
|
 |
|
|
|
Channel
(oblique view; right side of photo)
|
Channel
(x-section view; note asymmetry of trough)
|
Herringbone
X-stratification
(x-section view; above left of knife)
|
 |
 |
 |
|
Adhesion
marks
(plan view; wind-produced; note trace fossils at bottom of image)
|
Adhesion
structures
(x-sectional view; note reticulate and irregular shape of x-laminations)
|
Raindrop
Impressions
(plan view; superimposed on ripples)
|
|
Suspect-Microbial
Structures
|
 |
 |
 |
|
Sand
Stromatolites
(plan view of microbial buildup; note cauliflower-like growth)
|
Sand
Stromatolites
(plan view; widely spaced buildups)
|
Sand
Stromatolites
(plan view of rippled surface)
|
 |
 |
|
|
Sand
Chips
(note truncated end of bent laminated clasts; to lower left of coin)
|
Sand
Roll-Ups
(to right of pen; note coiled laminated sand clast)
|
Inverted
Flutes
(plan view; note bilobate trace fossil at top)
|
 |
|
 |
|
"Algal"
balls
(plan view)
|
Old
Elephant Skin
(plan view; note wrinkled texture)
|
Loaded
Sand Laminae w/OES
(plan view; note laminae exfoliating on ripple crests)
|
