Question

Complete the second Wheeler Diagram, Label onlap and downlap terminations

Write a brief description of the sequence stratigraphy (Order of events, systems tracts, Short paragraph)

10 shat points ground distance 50 240 -Alluvium GEOLOGIC CROSS SECTION OF AN IDEALIZED SEISMIC STRATIGRAPHY SECTION 100 150 200 Paralid Marine Proximal Color code on the Leave Wheeler Diagram the Blank systems tracts using Green the colors to the right) Yellow Shale Fan CONDENSED SECTION HST RANDSONNDOR TST RS Blue LST. SLOPE SYSTEM DEPTH Brown LST - BASIN FLOOR FAN DEPTH Geologic Time Chronostratigraphic Chart (Wheeler Diagram)

Answer 1

Ans- Sequence Stratigraphy - It is a branch of geology that attempts to subdivide and link sedimentary deposits into unconformity bound units on a variety of scales and explain these stratigraphic units in terms of variations in the rate of change in accommodation space . The essence of the method is mapping of strata based on identification of surfaces which are assumed to represent time lines ( for example - maximum flooding surfaces ) , and therefore placing stratigraphy in chronostratigraphic framework . Sequence stratigraphy is a useful alternative to a lithostratigraphic approach , which emphasizes similarity of the lithology of rock unit rather than time significance .

Sequence stratigraphy deals with genetically related sedimentary strata bounded by unconformities.

The sequence part of the name refers to cyclic sedimentary deposits . Stratigraphy is the geologic knowledge about the processes by which sedimentary deposits from and how those deposits change through time and space on Earth's Surface .

Order of events of Sequence stratigraphy - it is a branch of sedimentary stratigraphy , deals with the order in which depostionally related stratal successions (time rock) units were laid down in the available space or accommodation .

System tracts of sequence stratigraphy - A system tract is the term used in sequence stratigraphy for strata deposited during a stage of a depositional sequence . The beds show either an aggradational or a progradational pattern as the shore line shifts seawards across the shelf .

There is three system tracts

1 - Lowstand System Tract ( LST )

2- Transgressive system tract ( TST)

3- Highstand system tract (HST )