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The Georgia Mineral Society, Inc. 4138 Steve Reynolds Boulevard Norcross, GA 30093-3059 |
GENERAL MEMBERSHIP MEETING
Meetings are 7:30 pm the first Monday of each Month
4138 Steve Reynolds Boulevard
Norcross, GA 30093-3059
Visitors and Guests are Welcome!
Date: November 4, 2024
Social Time: 7:00 pm
Meeting Time: 7:30 pm
Location: In-Person at GMS and Virtual via Zoom (link is on the GMS calendar here)
Speaker: Aaron Leatherwood
Topic: Salt Tectonics
Salt tectonics refers to the process where salt is involved in deformation to an extent that influences the type, geometry, and extent of the deformational structures that form. The ability for salt to form a lot of the structures that are seen is because when under pressure salt will behave like a highly viscous fluid and the density of salt, both pure and impure, is much lower than that of the surrounding rock, which means that it has a higher buoyancy than the surrounding rocks. Due to this lower density, the salt layers will try to rise to the surface trying to form a diapir. It is this feature of salt that allows for the creation of salt structures. Some of the structures that the salt layer can make are a canopy, wall, anticline, roller, pillows, glacier, sheets, stocks, and teardrops but all of which are closely related to a salt diapir in how they are formed. The structures that are made are dependent on a few features of the salt layer such as the type of flow in the layer, the style of deformation that is present on the rock, or how mature the diapir is when in its formation. Some controls limit the flow of salt in the salt layer those being differential loading, pressure differences, thermal loading, and displacement loading. Differential loading is the density and thickness variations in the overburden, pressure differences where salt will have less fluid-like. Displacement loading is boundaries such as faults controlling the flow. Thermal loading is the different buoyancy that hot salt has compared to that of cold salt. Lastly, some structures appear as part of the salt diapiric system such as drag folds from the friction of salt on the wall rocks, Flaps From sedimentary layers above the salt being forcefully pushed upwards, and rim synclines and mini basins from the withdrawal of salt from the area. In conclusion, salt tectonics is based on the movement of salt because it acts like a fluid under pressure, this motion of salt can be seen through all the structures salt makes during the process of diapirism.
Jane Stone
Vice President of Programs
General meetings are usually on the first Monday of the month. If this date falls on a holiday, the general meeting will be on the SECOND Monday of the month. In September, the annual picnic and auction replaces the general meeting and is held on a Saturday.
Social Time: 7:00 pm
Meeting Time: 7:30 pm
Location: In-Person at GMS and Virtual via Zoom (link is on the GMS calendar here)
Speaker: Aaron Leatherwood
Topic: Salt Tectonics
Salt tectonics refers to the process where salt is involved in deformation to an extent that influences the type, geometry, and extent of the deformational structures that form. The ability for salt to form a lot of the structures that are seen is because when under pressure salt will behave like a highly viscous fluid and the density of salt, both pure and impure, is much lower than that of the surrounding rock, which means that it has a higher buoyancy than the surrounding rocks. Due to this lower density, the salt layers will try to rise to the surface trying to form a diapir. It is this feature of salt that allows for the creation of salt structures. Some of the structures that the salt layer can make are a canopy, wall, anticline, roller, pillows, glacier, sheets, stocks, and teardrops but all of which are closely related to a salt diapir in how they are formed. The structures that are made are dependent on a few features of the salt layer such as the type of flow in the layer, the style of deformation that is present on the rock, or how mature the diapir is when in its formation. Some controls limit the flow of salt in the salt layer those being differential loading, pressure differences, thermal loading, and displacement loading. Differential loading is the density and thickness variations in the overburden, pressure differences where salt will have less fluid-like. Displacement loading is boundaries such as faults controlling the flow. Thermal loading is the different buoyancy that hot salt has compared to that of cold salt. Lastly, some structures appear as part of the salt diapiric system such as drag folds from the friction of salt on the wall rocks, Flaps From sedimentary layers above the salt being forcefully pushed upwards, and rim synclines and mini basins from the withdrawal of salt from the area. In conclusion, salt tectonics is based on the movement of salt because it acts like a fluid under pressure, this motion of salt can be seen through all the structures salt makes during the process of diapirism.
Jane Stone
Vice President of Programs
General meetings are usually on the first Monday of the month. If this date falls on a holiday, the general meeting will be on the SECOND Monday of the month. In September, the annual picnic and auction replaces the general meeting and is held on a Saturday.
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