## What is an isopach plan?

An isopach map displays lines of equal thickness in a layer where the thicknesses are measured perpendicular to the layer boundaries. Isopach maps are also referred to as True Stratigraphic Thickness (TST) maps. Isochore maps in geology are also referred to as True Vertical Thickness (TVT) maps.

## What is the difference between Isochore and isopach?

Isopach and isochore describe a map showing the thickness of a unit in the subsurface. Isochore maps measure the thickness from a point on the upper surface straight down to the corresponding point on the lower surface. Isopach maps display the stratigraphic thickness between an upper and lower horizon.

How do I create an isopach map?

To construct an isopach map from borehole logs, one locates the top and bottom of the stratigraphic unit on a given log, subtracts the lesser depth from the greater, and plots the resulting thickness on a map. Repetition for each of the available logs generates the data that are then contoured on the map.

What is a structural map?

Structural mapping is the identification and characterization of structural expression. Structures include faults, folds, synclines and anticlines and lineaments. Understanding structures is the key to interpreting crustal movements that have shaped the present terrain.

### What is an Isochore graph?

An isochore is a graph representing the state of a system using two variables, for example pressure and temperature, while the volume remains constant.

### What is an Isochore Class 11?

Isochore is the plot between P and T for a definite amount of a gas at a constant volume.

What is ISO height?

The geopotential height is the distance above the Earth’s surface if it was a perfect and flat sphere. Isohypse are shown on a constant pressure surface. For example, when looking at a 850 mb chart, all isohypses no matter their value are located at 850 mb.

What is Isolith map?

An Isolith Map is a map that contains contour lines which depict the thickness of a lithology. These maps help geologists to select a particular component of the rock in a stratigraphic unit and analyze its structure, components, thickness, permeability and other physical or chemical properties.

#### What is lithological mapping?

The Lithological Mapping theme (1984-1988) was devoted to image processing and field control of satellite imagery as part of the GARS Africa Project. Discrimination of lithological units within metasedimentary complexes. Recognition of different types of intrusive rocks.