Stratigraphic Section A sequence of vertical rock layers

Stratigraphic Section A sequence of vertical rock layers in the sedimentary rock in the law of superposition

How to do… v stratigrafi measurement section is: • obtain detailed data from thesequence of litology unit (formation, group, members, etc. ) • Obtaining the precise thickness of each unit stratigrafi • To obtain and learn stratigrafi relationship between a rock and stream sedimentation in the vertical direction in detail, analyze the environment for settling Teknologi dan Rekayasa

Field Implementation Procedure v Ideally be done at the end of the geological mapping, in which information about the geological conditions such as the distribution of rock, geological structure is known can be chosen so that the orbitcrossing the ideal (the outcrop, is not subject to the structure, etc. ) v At the same time with the mapping, especially in areas difficult to reach Teknologi dan Rekayasa

Stages of measurement v. Planning v. Taking The data v. Calculate thickness Teknologi dan Rekayasa

Planning v The position of a layer (strike and dip), is steep, sloping, vertical or horisontal. Arah track akan wherever that may be perpendicular to the moment. v Must be examined whether the moment and slope layer is continuous or permanent change. The things mentioned above are important in determining the method of calculation and measurement. v Superposisi determination of lapisan. Kriteria for this superposisi generally obtained from the structure of the sediments that have v Will examine the layers of a (key beds) Teknologi dan Rekayasa

TAKING THE DATA v Measurement v Observation and diskripsi Teknologi dan Rekayasa

MEASUREMENT v The distance measured between patok v Azimuth (direction of the track) v Talus slope v Jurus and slope gradient Teknologi dan Rekayasa

Observation and Description v Name of rock v Stone and major insertion v Pemerian litologi each layer v Relationship with the unit above Teknologi dan Rekayasa

Sketches and stratigraphic column v Sketches Teknologi dan Rekayasa

Calculate thickness v Measurements on flat areas v Measurement cycle in the field: • Slope of the direction of the gradient layer • Slope layer opposite direction with the slope Teknologi dan Rekayasa

Measurements on flat areas Formula: T = dt ∂ x sin T dt ∂ = thick layer = the distance measured in the field = Corner slope layer Teknologi dan Rekayasa

The measurement of the direction of the gradient layer v Formula: T = d sin (∂ - s) (Figure 9. 5 b) Q = d sin (s - ∂) (Figure 9. 5 c) T = Thickness layer S = slope Corner ∂ = slope layer Teknologi dan Rekayasa

Measurement layer opposite direction with the slope v Formula: T = d (Figure 9. 6 c) Q = d sin (∂ + s) (Figure 9. 6 b) Q = d sin (180 - ∂ - s) (Figure 9. 6 d) T = Thickness layer ∂ = layer tilt angle s = slope Corner Teknologi dan Rekayasa