Geologic Time, Mass Wasting, & Rivers
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| principle of uniformitarianism | processes happening now happened before; large changes require a long time
🗑
|
||||
| principle of original horizontality | sediment deposited horizontally; tilted rocks deformed by tectonics
🗑
|
||||
| principle of superposition | younger formations on top
🗑
|
||||
| principle of lateral continuity | form in lateral sheets; erosion dissects once continuous layers
🗑
|
||||
| principle of cross-cutting relations | younger features cut older features
🗑
|
||||
| principle of inclusions | inclusions always older than enclosing material; must be present to be included
🗑
|
||||
| principle of fossil succession | index fossils determine time range
🗑
|
||||
| disconformity | erosion, lack of deposition
🗑
|
||||
| angular unconformity | relationship is angular
🗑
|
||||
| non-conformity | sedimentary deposited on top of eroded igneous or metamorphic rocks
🗑
|
||||
| relative dating | based on order of formation; younger or older
🗑
|
||||
| absolute dating | actual number of years
🗑
|
||||
| Hadean Eon | first; formation of Earth, molten core goes to center, oceans formed, meteorites
🗑
|
||||
| Archean Eon | second; continents, lithosphere formed, meteorites stop, rock record survives, mats of cyanobacteria
🗑
|
||||
| Proterozoic Eon | third; multi-cellular vertebrates appear
🗑
|
||||
| Phanerozoic Eon | fourth; Permian extinction @ beginning; hard-shelled organisms (better records), Pangaea rifts apart
🗑
|
||||
| Mesozoic Era/Jurassic and Triassic Period | Subduction sutures terrenes onto continent, collision build up Rockies, feathered birds, ancestors of mammals
🗑
|
||||
| Mesozoic Era/Cretaceous Period | seas flood continents, modern fish, flowers
🗑
|
||||
| K-T boundary event | Cretaceous-Tertiary, meteorite impacts, blots out sun -stops photosynthesis; evidence: plankton-free clay, iridium rich clay, micro tektites, buried crater visible
🗑
|
||||
| geologic column order | eon - era - period - epoch
🗑
|
||||
| classification of mass-movements | type of material, rate of movement, nature of mass, immediate surrondings
🗑
|
||||
| slides | rotational/slump: concave; translational: whole block slides down
🗑
|
||||
| falls | one chunk drops
🗑
|
||||
| flows | debri flows: muddy, granular, lahar-style; creep: air freezes, grains pulled out, air warms, grains pulled down
🗑
|
||||
| factors of slope stability (8) | water (adds weight, lubricates); steepen slope; remove base/top; add material to top (pipes, adds water); remove vegetation; tilted bedding planes; composition of slope; preexisting weaknesses
🗑
|
||||
| base level | level below which stream cannot erode
🗑
|
||||
| discharge | cfs
🗑
|
||||
| bedload | sediment being transported
🗑
|
||||
| gradient | slope
🗑
|
||||
| sinuosity | curviness
🗑
|
||||
| too much discharge | increase sinuosity, decrease gradient - lower discharge
meandering stream
🗑
|
||||
| too much sediment | decrease sinuosity, braided stream
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
haleybaker
Popular Science sets