Exogenic processes Flashcards

1
Q

Hvor dominerer aolian processes

A

Hvor der er mere fordampning end nedbør
- ørken

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2
Q

Hvad er en rain shadow

A

Når regn ikke kan komme om på den anden side af et bjerg

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3
Q

Hvilket vejrfænomen har stor indflydelse på erosion

A

Storme

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4
Q

Hvad kaldes en individuel storm deposit

A

Tempestite

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5
Q

Hvordan ser en perfekt tempestite ud

A

Skarp eroderet bund
Strukturløs groft sediment - grus
HCS i finere sand
Silt med horisontal wave ripples lamination
Mudder

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6
Q

Hvilke tre tidal tids regimes findes

A

Microtidal: tidal range < 2m
Mesotidal: 2m < tidal range < 4m
Macrotidal: tidal range > 4m

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7
Q

Hvad er neap og spring tide

A

Neap = lille = sol og måne modsat
Spring = stor = sol og måne sammen

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8
Q

Hvad sker der med energien i vandet i løbet af et tidevandforløb

A

Når der er høj- og lavevande har vandet mindst energi

Midt imellem de to er der mest flow energi

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9
Q

Hvad indikerer Sigmoidal cross-bedding

A

Tidevand

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10
Q

Hvor mange neap og spring vil man se på en månecyklus (måned)

A

To af hver

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11
Q

Hvilken slags lamination ses med tidevandsmiljøer

A

Flaser, wavy and lenticular
lamination

Rhythmic variation of mud-tosand ratio.

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12
Q

Hvad er Walters lov

A

Seaward-fining of sediments due to decrease
of water energy with depth

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13
Q

What characterises hummocky cross stratification

A
  1. Upward curvature of laminations
  2. Low-angle, curved lamina intersections
  3. Very long wavelengths, low heighs: Lamina dips normally less than 10 degrees.
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14
Q

diurnal inequality

A

The difference in height between successive high or low tides. Can be seen in sediments.

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