FOLDS+AND+FAULTS

The materials of the crust are deformed as a result of the internal dynamics of the Earth, due to the forces of compression and distension. A **fold is** as a bend in rock that is the response to compressional forces. Folds are most visible in rocks that contain layering. The main parts of a fold are: The **hinge line** (CHARNELA) is the maximum curvature of the fold. The **limbs** (FLANCOS O LADOS) are the lateral planes of the fold. The **axial plane** (PLANO AXIAL) is the plane which contain all the hinge lines. The **angle of purge** (ÁNGULO DE IMMERSIÓN) is the angle formed by a limb with the horizontal plane. An **anticline** is a [|fold] that is [|convex]up (that resembles an arch like structure) and has its oldest [|beds] at its core. A **syncline** is a [|fold] with younger layers closer to the center of the structure. Both anticlines and synclines are the result of compressional stress. A fault is a fracture of rock which is always accompanied by a **displacement** between the two blocks. Fracture with no displacement are called **joints** (DIACLASAS) Main parts of a fault: The walls (BLOQUES DE FALLA) The fault jump (SALTO DE FALLA) The fault plane (PLANO DE FALLA) "Now, draw in your notebook the different types of faults" || || go to the next link and answer the final questions: [|TECTONIC STRUCTURES: FOLDS AND FAULTS] What is the name that correspond to the following animations A and B? || || __**ANIMATION B**__ ||
 * [[image:http://web.arc.losrios.edu/~borougt/AnticlineSyncline.jpg width="382" height="346"]] || [[image:http://homepage.ufp.pt/biblioteca/GlossarySaltTectonics/PlatesJPG/Fig.F017-HingeFold.jpg width="382" height="294"]] ||
 * //__**CONTENT THAT YOU WILL WRITE DOWN IN YOUR NOTEBOOK:**__//
 * TECTONIC STRUCTURES: FOLDS AND FAULTS:**
 * FOLDS.**
 * FAULTS.**
 * When you have finished with the writing of the definitions and different types of structures
 * [[image:http://www.physicalgeography.net/fundamentals/images/rerversed.gif width="375" height="238"]]ANIMATION A || [[image:http://www.physicalgeography.net/fundamentals/images/normal.gif width="375" height="238"]]