sedimentology

Question 1

Reynolds number for laminar flow

Answer 1

< 2000

Question 2

Reynolds number for turbulent flow

Answer 2

> 4000

Question 3

what flow type is represented by Reynolds number 2000 to 4000

Answer 3

transitional flow state

Question 4

example of a laminar flow

Answer 4

tap on low power

Question 5

example of a turbulent flow

Answer 5

water fall

Question 6

what flow system is velocity vs viscosity

Answer 6

Reynolds number

Question 7

what is a Froude number

Answer 7

relationship between velocity and depth of river

Question 8

what defines a supercritical flow

Answer 8

shallow fast flow Froude 1+

Question 9

what defines subcritical flow

Answer 9

deep slow moving river Froude 1-

Question 10

what is defined by a Froude number of 1

Answer 10

critical flow

Question 11

what is the suspended load

Answer 11

sediment moving in suspension and unable to settle

Question 12

what are the 2 modes of bedload transport

Answer 12

saltation and traction

Question 13

what structure is formed with subcritical flow

Answer 13

normal ripples and dunes

Question 14

what structure is formed in supercritical flow

Answer 14

antidunes

Question 15

large grain size with slow-moving water

Answer 15

lower phase plane bedding

Question 16

current ripples

Answer 16

4cm ripple with lee and stoss side

Question 17

what is the difference between dunes and ripples

Answer 17

dunes are bigger and cross-bedding and sorting are more clear

Question 18

what structure is formed from 2D ripples

Answer 18

tabular/planar cross-bedding

Question 19

what structure is formed from 3D ripples

Answer 19

trough cross-bedding

Question 20

small grain size in fast-moving water

Answer 20

upper phase plane bedding

Question 21

antidunes

Answer 21

dune structure that migrates upstream

Question 22

what is a good leg scale for fieldwork

Answer 22

1:50 so 1cm (log) = 50cm (rock)

Question 23

what is a good leg scale for data presentation

Answer 23

1:200 so 1cm (log) = 200cm (rock)

Question 24

facies

Answer 24

a rock with distinct texture composition or structure

Question 25

facies association

Answer 25

facies that can be grouped into a depositional environment

Question 26

how many facies to aim for

Answer 26

5 to 20

Question 27

what is Walther's law

Answer 27

what is adjacent vertically is adjacent horizontally in map view

Question 28

where does Walther's law not apply

Answer 28

unconformities and other structural weirds

Question 29

sedimentary basin

Answer 29

sediment can accumulate generally because there is subsidence

Question 30

alluvial fan

Answer 30

small scale coarse sand and conglomerate

Question 31

alluvial sequences

Answer 31

poorly sorted fining upwards

Question 32

alluvial deposition environment

Answer 32

start of basin at bottom of mountain

Question 33

fluvial overbank sediment composition

Answer 33

fine grain interbedded muds and bioturbation

Question 34

fluvial channel

Answer 34

coarse sand with trough cross-bedding

Question 35

meandering river bare:channel:depth ratio

Answer 35

100:10:1

Question 36

wher are miandering rivers

Answer 36

mid basin

Question 37

meandering lithology

Answer 37

interbedded muds and sand with ripples

Question 38

anastomosing

Answer 38

river split up instead of combining

Question 39

anastomosing properties

Answer 39

similar properties to meandering but anastomoses

Question 40

aeolian environment

Answer 40

desert with wind-blown sand

Question 41

aeolian lithology

Answer 41

fine sand with dunes and graded bedding

Question 42

shore face gradient

Answer 42

0.1

Question 43

shellf gradient

Answer 43

0.5

Question 44

slope gradient

Answer 44

5 degres

Question 45

fer wether wave base

Answer 45

3 to 10

Question 46

storm wave base

Answer 46

15 to 40

Question 47

strucher formed in storm waves

Answer 47

HCS

Question 48

mesher FWWB

Answer 48

wave length/2

Question 49

balma sicwens

Answer 49

cors sand, sand, silt, mud, repet

Question 50

balma secwens struchers

Answer 50

sand lair start uper planer lamination trogh ripels to lower planer lamination

Question 51

what corses balma secwens

Answer 51

terbidity flowe

Question 52

shalow meren shelf bedforms

Answer 52

delta, forshore, barrior bare

Question 53

wher is the delta

Answer 53

shalo merin. point river mets sea

Question 54

flued (sea water) requierd to dolimatise a cubic meter of limestone

Answer 54

650 cubic meters

Question 54

flued (worme sea water) requierd to dolimatise a cubic meter of limestone

Answer 54

450 cubic meters