Notas de lectura
Notes for Lecture 10 'Deformation – 2'
- Grado
- Institución
Notes for Lecture 10 'Deformation – 2' LEC 172 Geology
[Mostrar más]Vista previa 2 fuera de 10 páginas
Vista previa 2 fuera de 10 páginas
Añadir al carrito
Añadir al carrito
Vendedor
Seguir
ciarangreer
Vista previa del contenido
Monday 6th December 2021 LEC 172Deformation – 2
Folds:
Classification of folds – based on geometry and symmetry, and orientation of fold axis:
1. Monocline
2. Antiform/anticline
3. Synform/syncline
4. Symmetrical/upright fold
Folds form when rocks are stressed
5. Asymmetrical fold
within the plastic range.
6. Overturned fold
7. Recumbent fold
8. Plunging and non-plunging fold
9. Dome and basin
1. Monocline - a step-like fold in strata with a zone of steeper dip in an approximately horizontal
sequence.
Mechanisms of
formation:
• differential compaction over underlying structure, e.g., fault, at edge of basin and greater
compactibility of the basin fill
• reactivation of underlying fault coupled with uplift/subsidence
e.g., East Kaibab Monocline, Grand Canyon, Utah, USA
2. Antiform/anticline - an ‘n-shaped/up-arched’ fold
3. Synform/syncline - a ‘u-shaped/down-arched’ fold
e.g., Calico Mountains, California, USA
, 4. Symmetrical/upright fold - axial plane is vertical and each limb dips at the same angle
Dip and strike symbols used on geologic maps
Either: Long line indicates strike orientation; short line indicates dip direction,
with angle of dip in degrees.
Or: Arrow indicates dip direction, with angle of dip in degrees.
5. Asymmetrical fold - axial plane is inclined and limbs dip at different angles
6. Overturned fold - one limb has been rotated so much that it is now upside down; common in
mountain ranges
7. Recumbent fold - axial plane is horizontal; common in mountain ranges formed by compression at
convergent plate boundaries
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable. Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ciarangreer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 8,71 €. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
45,681 summaries were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now