Structural geology is the study of the three-dimensional of the rock units with respect to their deformational histories, Structure is spatial and geometrical configuration of rock components.
Structures are classified into two types:
Primary structures.
Secondary structures
Primary structures
Structures that form during deposition or crystallization of the rock, are the result of two processes:
Settling of solid particles from fluid medium in which they have been suspended, in most of the sedimentary rocks.
Crystallization of mineral grains from a liquid in which they have been dissolved as in igneous rocks.
Sedimentary texture can be useful in interpreting the mechanisms and environment of deposition. It also has major control over the porosity and permeability of sediment.
Structural geology is the study of the three-dimensional of the rock units with respect to their deformational histories, Structure is spatial and geometrical configuration of rock components.
Structures are classified into two types:
Primary structures.
Secondary structures
Primary structures
Structures that form during deposition or crystallization of the rock, are the result of two processes:
Settling of solid particles from fluid medium in which they have been suspended, in most of the sedimentary rocks.
Crystallization of mineral grains from a liquid in which they have been dissolved as in igneous rocks.
Sedimentary texture can be useful in interpreting the mechanisms and environment of deposition. It also has major control over the porosity and permeability of sediment.
Nature of Igneous Rocks, Magma, Lava, Textures, Types classification,compositions,Bowen’s Reaction Series, characteristics of magma, Origin of Magmas, Evolution of Magma, Magma Differentiation,Partial Melting,Fractional Crystallization, Plate Tectonic Setting of Igneous Rocks
A fault is a break or fracture between two blocks of rocks in response to stress.
One block has moved relative to the other block.
The surface along which the blocks move is called a fault plane.
Faulting produced the earthquakes.
Thus earthquakes may occur because:
a) Rocks are initially broken to produce a fault.
b) Movement or re-activation of an already existing fault.
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State of global ICS asset and network exposure
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https://alandix.com/academic/papers/synergy2024-epistemic/
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UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
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Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
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The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
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2. Heatmap utilization for testing
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4. Demo
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Execution from the test manager
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SAP heatmap example with demo
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2. Deformation
• Deformation involves:
– Stress – the amount of force applied to
a given area.
– Types of Stress:
–Confining Stress – stress applied
equally in all directions.
–Differential Stress – stress applied
unequally in different directions.
3. Deformational Stress
• Types of Differential Stress:
(1) Compressional Stress – shortens and thickens a
rock body (associated with convergent plate
boundaries).
(2) Tensional Stress – tends to elongate and thin or
pull apart a rock unit (associated with divergent
plate boundaries).
(3) Shear Stress – produces a
motion similar to slippage that
occurs between individual
playing cards when the top of
the stack is moved relative to
the bottom (associated with
transform plate boundaries).
5. Deformation
• Differential stress applied to rocks during
tectonic activity causes rocks to respond via
deformation.
• Strain – changes in the shape or size of a rock
body caused by stress.
• Strained rock bodies do not retain their original
configuration during deformation.
6. How Do Rocks Deform?
• Rocks subjected to stresses greater than
their own strength begin to deform
usually by folding, flowing, or
fracturing.
– General Characteristics of Rock
Deformation:
• Elastic deformation – the rock returns to
nearly its original size and shape when the
stress is removed.
• Once the elastic limit (strength) of a rock is
surpassed, it either flows (ductile deformation)
or fractures (brittle deformation).
7. • Factors that influence the strength
of a rock and how it will deform:
• Depth
• Temperature
• Confining Pressure
• Rock Type
• Availability of Fluids
• Time
How Do Rocks Deform?
8. • Rocks near the surface, where confining pressures and
temperatures are low, will behave as a brittle solid and
fracture once their strength is exceeded.
• Rocks at depth, where confining pressures and
temperatures are high, will exhibit ductile behavior or
solid-state flow, in which changes occur without
fracturing.
How Do Rocks Deform?
9. Crustal Structures
• Folds – During crustal deformation rocks
are often bent into a series of wave-like
undulations.
– Anticlines and Synclines
– Domes and Basins
– Monoclines
• Characteristics of Folds:
• Most folds result from compressional
stresses which shorten and thicken the crust.
• Most of them occur in a series.
10. Anatomy of a Fold
• Limbs – Refers to the two sides of a fold.
• Axis (or Hinge) – A line drawn down the
points of maximum curvature of each
layer.• Axial Plane – An
imaginary surface
that divides a fold
symmetrically.
• Plunge – In
complex folding,
the axis is often
inclined at an angle
called plunge.
12. Common Types of Folds
• Anticline – upfolded
or arched rock
layers.
• Syncline –
downfolds or
troughs of rock
layers.
Photo courtesy of J. T. Daniels
http://disc.gsfc.nasa.gov/geomorphology/GEO_2/GEO_PLATE_T-42.shtml
Photo courtesy of Brennan T. Jordan, Department of Earth Sciences,
University of South Dakota
http://www.usd.edu/~Brennan.Jordan/
13. Common Types of Folds
• Depending on their orientation, anticlines and
synclines can be described as…
• Symmetrical, asymmetrical, overturned, recumbent
(a type of overturned fold – “lying on its side”), or
plunging.
19. Other Types of Folds
• Monoclines
• Large, step-like folds in otherwise horizontal sedimentary strata.
• Closely associated with faulting.
20. Other Types of Folds
• Dome
• Upwarped displacement of rocks.
• Circular or slightly elongated structure.
• Oldest rocks in center, younger rocks on the flanks.
21. Other Types of Folds
• Basin
• Circular or slightly elongated structure.
• Downwarped displacement of rocks.
• Youngest rocks are found near the center, oldest
rocks on the flanks.
22. Crustal Structures
• Faults – Fractures in rocks along which appreciable
displacement has taken place.
• Fault Zone – Displacements along multiple interconnected
faults.
• Sudden movements along faults are the cause of most
earthquakes.
23. Types of Faults
• Classified by their relative movement
which can be Horizontal, Vertical, or
Oblique.
24. Summary of Fault Types
• Dip-Slip Faults:
• Normal (gravity) – associated with divergent plate
boundaries.
• Reverse and Thrust – associated with convergent
plate boundaries.
• Strike-Slip Faults:
• Lateral (right and left) – associated with transform
plate boundaries.
25. Dip-Slip Faults
• Movement is
mainly parallel to
the dip of the
fault surface.
• Parts of a dip-slip
fault include the
hanging wall
(rock surface
above the fault)
and the footwall
(rock surface
below the fault).
26. Dip-Slip Faults
• Normal Fault (gravity)
Dip-Slip Faults
– Hanging wall block moves
down relative to the footwall
block.
– Tensional stress
– Accommodate lengthening or
extension and thinning of the
crust.
– Associated with divergent plate
boundaries.
– Most are small with
displacements of a meter or so.
– Larger scale normal faults are
associated with structures
called fault-block mountains
(Teton Range in Wyoming,
Basin and Range Province in
Nevada).
28. Normal Faulting – Fault Block Mountains
• Fault-Block Mountains – Basin and Range Province
in Nevada – topography generated by a system of
roughly north to south trending normal faults.
• Movements along these faults have
produced alternating uplifted blocks
called horsts (form elevated ranges)
and down-dropped blocks called
grabens (form basins).
• Half-Grabens – a tilted fault block in
which the higher side forms
mountainous topography and the
lower side forms a basin that fills
with sediment.
• Detachment Fault – nearly horizontal
fault extending up to hundreds of
kilometers into the subsurface.
Smaller faults are connected to this
larger fault. Boundary between
ductile and brittle deformation.
29. Dip-Slip Faults
• Reverse and Thrust Dip-Slip Faults
– Hanging wall block moves up relative to the
footwall block.
– Reverse faults have dips greater than 45o
– Thrust faults have dips less than 45o
.
• Strong compressional stress.
• Accommodate shortening
and thickening of the crust.
• Associated with convergent
plate boundaries.
32. Strike-Slip Faults
• Dominant displacement is horizontal
and parallel to the strike of the fault.
• May produce broad zones of roughly
parallel fractures up too several
kilometers in width.
• Shear stress.
• Associated with transform plate
boundaries.
34. Types of Strike-Slip Faults
• Right-Lateral – as you face the fault, the
opposite side of the fault moves to the right.
• Left-Lateral – as you face the fault, the
opposite side of the fault moves to the left.
http://www.pbs.org/wnet/savageearth/animations/
Animations:
Right-Lateral
Strike-Slip Fault
35. Types of Strike-Slip Faults
• Transform Fault
– Large strike-slip
fault that cuts
through
accommodates
motion between
two large crustal
plates.
– Example: San
Andreas Fault
System
43. Mapping Geologic Structures
• Geologists measure the orientation or
attitude of a rock layers or
fault/fracture surfaces in order to
describe and map geologic structures
that result from deformation.
44. Mapping Geologic Structures
– Strike (Trend)
• The compass direction of the line produced by the
intersection of an inclined rock layer or fault with a
horizontal plane.
• Generally
expressed an an
angle relative to
north.
• Example: N10ºE
45. Mapping Geologic Structures
– Dip (Inclination)
• The angle of inclination of the surface of a rock unit
or fault measured from a horizontal plane.
• Includes both an
inclination and a
direction toward
which the rock is
inclined.
• Example: 30ºSE
46. A Geologic Map Showing
Strike and Dip of Structures
By knowing the strike and dip, geologists can predict the nature of
rock structures hidden beneath the surface.