February 6, 2024

Faults, Folds

Steven Ogilvie

This blog examines some key features of thrust systems with an example from seismic data offshore Namibia and from a hand specimen onshore UK.

February 1, 2024

Fractures, joints

Steven Ogilvie

Deformation band contained Joints

This blog looks at joints contained within zones of deformation bands - how they form and if they are important or not.

January 19, 2024

Fractures

Steven Ogilvie

Geomechanics approach to fracture prediction

This blog describes the value of a geomechanical approach to fracture prediction; for example thin beds often have more fractures than thick beds.

$Geomechanics approach to fracture prediction$

December 7, 2023

Deformation Bands, Faults

Steven Ogilvie

Deformation Bands in Permian Sandstones, ...

This blog looks at some key features of zones of deformation bands. Featured are 2 outcrops of Permian age sandstone from Scotland, UK.

August 23, 2023

Stylolites

Steven Ogilvie

Stylolites in Sandstones

This blog focuses upon stylolites which are structures that either form during burial or by later tectonic movements and have a serrated appearance on rock surfaces.

Anderson's Model

Steven Ogilvie

June 21, 2023

Crossing Conjugates in Deformation Bands

Steven Ogilvie

June 21, 2023

Crossing Conjugates in Deformation Bands

This blog looks at pairs of faults known as conjugates. Often, one fault is older than the other which can be determined if that fault has been displaced by the other. The example faults here are actually made up of deformation bands so could be described as compound zones of deformation bands.

Steven Ogilvie

July 6, 2020

Faults, Fault Framework

Anderson's Model of Faulting

Steven Ogilvie

July 6, 2020

Faults, Fault Framework

These conjugate normal faults are found in the Permo-Trias Hopeman Sandstone, Inner Moray Firth, UK. Here we look at these within the context of Anderson’s model and what it means when for example interpreting seismic data.

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