Most common is sand
2mm to 1/16mm
(a) Terregenous sand: caused by minerals on land particles carried to the
sea by streams ect.
Cape - quarky sand (most common)
Fieldspar
Meca
Homblande
(b) Calcarenite Sand: made up of shelf fragments - forms corals (CaCOa)
(c) Anthegenic Sand precipitation from sea H2O
Oolites (CaC03)
Glauconites (green)
Phosphate (brown)
Can usually see sand grains individually
Sand usually contains all three types. Sand is named from highest %(percent) present.
(2) Most common type of deposition sediment on the self is mud (or lutite)
Diameter of grain is less than 1/16
(a) Silt (1/16) mm to (1/256) mm
(b) Clay (less than 1/256 mm)
Difficult to see by eye the grains
Diagnostic Fracture
Dry species
If holds together = mud
If separates = sand
(3) Most Common type of sediment is gravel than (4 mm) long
(a) Gravel = less than 4 mm
(b) Pebble = 4-64 mm long
(4) Volcanic Fragments
(a) Bombs (larger deposit)
(b) Ash - (dust)
(c) Pumice poris SID2 (glass)
(6) Mollusks
(7) Sponges
(8) Hard Rock bottom