Planar Lamination On Stratigraphic Column

Recognize characteristic sedimentary structures in each unit.

Planar lamination on stratigraphic column.

If you hypothesized that set of a fining upward sandstones were turbidites which have planar lamination and current ripple cross lamination but there is also trough cross stratification in a number of the beds ask yourself if there is a way for trough cross stratification to form in turbidites. Look for sedimentary structures that are characteristic of a specific environment or process. Posted by dawn sumner at 10 24 am. Here palaeocurrent indicators are south south eastward mean resultant azimuth 145.

Which displays a faint planar lamination disrupted by polygonal fractures. The late jurassic stratigraphic column of saudi arabia. Use appropriate symbols when drawing the stratigraphic column. Planar lamination present if not disrupted by bioturbation.

In geology cross bedding also known as cross stratification is layering within a stratum and at an angle to the main bedding plane. Stratigraphic age is based on gradstein et al s 2012 time scale. Divide different units according to the lithology. Evaluate how the vertical sequence of sedimentary structures changes to refine or correct your environmental interpretations.

Through transect of exposed strata along the coppermine river. Interpreting stratigraphic columns step 1. Planar lamination or stratification. Cross stratification angles vary from 0 to 20 fig.

In addition to the mega ripples planar lamination low angle lamination 4 8 and hummocky cross stratification within the beds are also present. Thin lenses and stringers of igneous pebble conglomerate occur near the base of the unit. The original depositional layering is tilted such tilting not being the result of post depositional deformation cross beds or sets are the groups of inclined. Here are some example stratigraphic columns to think about.

Turbidites vs river channel deposits. The sedimentary structures which result are roughly horizontal units composed of inclined layers. Wave action intensely affects lower shoreface only during storm events. The planar laminated to low angle cross stratified facies typically shows fine lamination that is geometrically arranged in bed sets having horizontal to low angle cross stratification.

Primarily finer sands with layers of mud. Mud rip up clasts detrital peloids and petrified woody debris are common. Planar lamination and large scale trough cross stratification are abundant. Evaluate how the vertical sequence of sedimentary structures changes to refine or correct your environmental interpretations.

Steps when drawing a stratigraphic column photo by huan cui 1.