Cliff Stratigraphy Cliff Stratigraphic Column or Strat Column

Cliff Stratigraphy

Cliff Stratigraphic Column or “Strat” Column

Strat Columns channels Fossils

5 4 3 2 1 Present day beach

Data Table Layer ID 1 2 3 4 a 4 b 5 Grain Size (mm) Rounding Sediment Other characteristics Type (layers, acid) Rock Name Fossils

Grain Size Chart Grain Size (mm) Sediment Type > 256. 0 Boulder 64. 0 – 256. 0 Cobble 4. 0 – 64. 0 Pebble 2. 0 - 4. 0 Gravel 0. 062 – 2. 0 Sand 0. 004 - 0. 062 Silt < 0. 004 Clay Rounding Chart Very Angular Sub-Angular Sub. Rounded Very Rounded

Rock Names Chart Sediment Type Rounding Other Rock Name Gravel, Pebble, Cobble Sub-rounded to Very Rounded Conglomerate Gravel, Pebble, Cobble Sub-angular to Very Angular Breccia Sand -- Sandstone Silt -- Siltstone Clay -- Claystone Clay or Silt -- Breaks along layers Shale Skeletal/Shell fragments -- Dissolves with acid Limestone

1. Sediment -Grain size < 0. 004 mm -Rock breaks into thin pieces along layers -Does not dissolve with acid -Can’t see rounding (leave blank)

Data Table Layer Grain ID Size (mm) 1 2 3 4 a 4 b 5 < 0. 004 Other characteristics (layers, acid) Sediment Type Rounding Rock Name Fossils

1. Sediment -Grain size < 0. 004 mm -Rock breaks into thin pieces along layers -Does not dissolve with acid -Can’t see rounding (leave blank)

Data Table Layer Grain ID Size (mm) 1 2 3 4 a 4 b 5 < 0. 004 Other characteristics (layers, acid) Layers, breaks along layers, not dissolve in acid Sediment Type Rounding --- Rock Name Fossils

Grain Size Chart Grain Size (mm) Sediment Type > 256. 0 Boulder 64. 0 – 256. 0 Cobble 4. 0 – 64. 0 Pebble 2. 0 - 4. 0 Gravel 0. 062 – 2. 0 Sand 0. 004 - 0. 062 Silt < 0. 004 Clay Rounding Chart Very Angular Sub. Rounded Very Rounded

Data Table Layer Grain ID Size (mm) 1 2 3 4 a 4 b 5 < 0. 004 Other characteristics (layers, acid) Sediment Type Rounding Layers, breaks along layers, not dissolve in acid Clay -- Rock Name Fossils

Sediment Rounding Other Rock Name Gravel, Pebble, Cobble Subrounded to Very Rounded Conglomerate Gravel, Pebble, Cobble Subangular to Very Angular Breccia Sand -- Sandstone Silt -- Siltstone Clay -- Claystone Clay-Silt -- Breaks along layers Shale Skeletal/S hell fragments -- Dissolves with acid Limestone

Data Table Layer Grain ID Size (mm) 1 2 3 4 a 4 b 5 < 0. 004 Other characteristics (layers, acid) Sediment Type Rounding Rock Name Layers, breaks along layers, not dissolve in acid Clay -- Shale Fossils

1. Fossils Jaw bone from octopus/squid type animal Shells from snails (Molluscs) Shark and ray teeth

Data Table Layer Grain ID Size (mm) 1 2 3 4 a 4 b 5 < 0. 004 Other characteristics (layers, acid) Sediment Type Rounding Rock Name Fossils Layers, breaks along layers, not dissolve in acid Clay -- Shale Snail shells, octopus jaw bone, shark and ray teeth

Laye r ID Grain Size (mm) Other characteristic s Sediment Type Roundin g Rock Name Fossils 1 <0. 004 Layers, Doesn’t dissolve with acid Clay -- Shale Molluscs, shark teeth, octopus bones 2 4. 0 - >256. 0 Doesn’t dissolve with acid Pebble, Cobble, Boulder Subangular Breccia Molluscs, shark teeth, octopus bones 3 0. 08 Doesn’t dissolve with acid Sand Rounded Sandstone Molluscs, bony fish 4 a 0. 08 Doesn’t dissolve w acid Sand Rounded Sandstone Rounded to very rounded Molluscs, bony fish, wood Conglomerate 4 b 4 -256 Channel shaped pebble, cobble 5 4 -256 Doesn’t dissolve with acid Pebble, cobble Rounded to very rounded Conglomerate Wood, bones, teeth

5 4 3 2 1 Present day beach 5 4 3 2 1 Column Fossils

Stratigraphic Column Symbols Sandstone Shale Limestone Lenses or Channels Conglomerate or Breccia Rounded Angular

5 4 3 2 1 Present day beach