March 6 at 7 pm, GHCA meeting and webinar:
Stress, Strain, and Rheology
What happens when push comes to shove deep in the earth.
Rheology is about how the various characteristics of a material changes when force is applied. An elastic spring changes size or shape as applied force is increased. It snaps back to its normal size when the force is removed. But if too much force is applied the spring will be permanently deformed in size and shape. Water at normal pressure is a solid below 32ºF but liquid above that up to 212ºF and a vapor above that. Changes like solid, liquid, or vapor are “phase changes”. At temperatures and pressures deep inside the Earth’s mantle, rocks there can have more than on solid phase state as well as a liquid state. These phase changes make rheology rather complicated. They also make it difficult to model just what will happen during events like plate subduction. On March 6 we will build an introduction to rheology in geology. This will play a large role in upcoming presentations. It will be a lot more fun when we understand these issues. It is also fun to keep the speakers on their toes while they present. Please join us for this adventure of science and Bible discovery.
Register for this meeting webinar here. |
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Meeting Location
This event will be presented at GHCA’s usual meeting location, Houston’s First, The Loop, Reception Room at 7401 Katy Frwy, Houston TX 77024. See the maps in the right sidebar.