What are UNCONFORMITIES?

What are UNCONFORMITIES?

The LAW of SUPERPOSITION is easy. • What about this?

The LAW of SUPERPOSITION is easy. What about this?

The LAW of SUPERPOSITION is easy. • What about THIS!!??

BBC • Look at BBC videxerpt: “How did we get here?”…do quiz. http://www.dailymotion.com/video/x1dp3l7_how-did-we-get-here-the-story-of-science-nova-discovery-history-space-documentary-hd_t • 1-8 exploration & archiving diversity • 12-17 minutes (fossilized Paris) • 22:45-27 minutes (age of Earth experiment) • 27-33 minutes (Geology inventor, Scottish unconformity—deep time—we are extensions of life) • 39-42 Darwin • 42-51 Wegener & plate techtonics, continental drift & biological evolution

UNCONFORMITIES are GAPS or deformations in our geologic records that say “something BIGhappened here!”

UNCONFORMITIES are GAPS or deformationsin our geologic records that say “something BIG happened here!”

deformations

deformations draw a deformed face next to this word in your notes!

deformations

causes of unconformities: The Sawatch Sandstone was once again the subject of my interest. It is well exposed on the side of an onramp just west of town. Here's a picture of the unconformity between the Sawatch and the Pike's Peak Granite. Fantastically well exposed, as usual it seems. What is amazing is how little relief there is on the unconformity. Perhaps a decimeter in the area I saw it, which is impressive considering there is about 500 million years of time missing. GAPS

The Sawatch Sandstone was once again the subject of my interest. It is well exposed on the side of an onramp just west of town. Here's a picture of the unconformity between the Sawatch and the Pike's Peak Granite. Fantastically well exposed, as usual it seems. What is amazing is how little relief there is on the unconformity. Perhaps a decimeter in the area I saw it, which is impressive considering there is about 500 million years of time missing.

causes of unconformities: The Sawatch Sandstone was once again the subject of my interest. It is well exposed on the side of an onramp just west of town. Here's a picture of the unconformity between the Sawatch and the Pike's Peak Granite. Fantastically well exposed, as usual it seems. What is amazing is how little relief there is on the unconformity. Perhaps a decimeter in the area I saw it, which is impressive considering there is about 500 million years of time missing. GAP

causes of unconformities:

causes of unconformities: • e____q____s • mud_____s

causes of unconformities: • e____q____s • mud_____s • fl___ds • ts______s • r_____gr_v___s • m_______rs • v_______s • h__r_____es

causes of unconformities: • earthquakes • mudslides • floods • tsunamis • rushing rivers • meteors • volcanos • hurricanes

causes of unconformities: • earthquakes • mudslides • floods • tsunamis • rushing rivers • meteors • volcanos • hurricanes NATURAL DISASTERS INVOLVING EROSION!

UNCONFORMITIES are GAPS or deformations in our geologic records that say “something BIG happened here!” unconformity=catastrophic geologic event… earthquake, volcano, mudslides, meteors etc.

Here’s an example of an unconformity.

HERE’S AN EXAMPLE OF AN UNCONFORMITY. First, S was formed, then S

HERE’S AN EXAMPLE OF AN UNCONFORMITY. First, S was formed, then r,q,p,o… O P Q R S

HERE’S AN EXAMPLE OF AN UNCONFORMITY. First, S was formed, then r,q,p,o…then BOOM! O P Q R S

HERE’S AN EXAMPLE OF AN UNCONFORMITY. First, S was formed, then r,q,p,o…then BOOM--UNCONFORMITY! U O P Q R S

HERE’S AN EXAMPLE OF AN UNCONFORMITY. First, S was formed, then r,q,p,o…then BOOM--UNCONFORMITY! Afterwards, layers f, d & e formed. E D F U O P Q R S

Moving on… • Which one (left or right) had the FAULT happen BEFORE the INTRUSION? • What happened between layers A & B? D E D

CAN WE DATE THESE LAYERS FROM OLDEST TO YOUNGEST?

Can you spot the unconformity?

Go to What’s an unconformity” • Kids work in pairs with whiteboards to tell the story about rocks from Portugal! • Then to rock ice cores…

What are UNCONFORMITIES?