lect. 8 & 9 sed structures - copy
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7/24/2019 Lect. 8 & 9 Sed Structures - Copy
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SEDIMENTARY
STRUCTURES
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Sedimentary structures "!&%$# "!
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PRE-DEPOSITIONAL STRUCTURES
Uncjnqjrmity 4"*!" . #$+Z-.
5!" 9:$
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}rjj~eMarsUTE MARS Tjjk Mars
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Syn-depositional - Interbeds structuresDepositional structures
structural bed fors
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Bedding&2*!"
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&2*!"eddin($_ \-P ?$} H!" ;7!"
( Strata Bed ayer aminaG
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ettijvn Ckassiqicatijn( 1f cm kay J! &8
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Massi~eeddin
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kateddin*;!" &2*!"34" -0 *;!" &2*!" $54 Q
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$*!"GCurrent ineatijnB;*!" -0
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.*;!" &2*!" }radededdin( iner uard Njrmak radin
( Cjarser uard Re~erse radin
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8$*;!" &2*!" Crjsseddin R jkiue eddin
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( Cross-beddin! indicates "i!" andunidirectional current #elocity$ often
%inds in terrestrial settin!s$ forin!sand dune lee-slopes&
( Cvaracter jq eddin qrjm simke vjrijntak kaminae tj cross-bedding ripples soft-sediment deformation jr bioturbated
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Rike eddin and crjsskaminatijn8$*;!" g*!"- 3;%!" &2*!"
`%!" #$:> $520 L Q
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( Ripple ar's record bac'-and-fort" action by %a#es in s"allo% %ater&
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(,* ./01*Lee side2034* ?@8 901:B ;
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(?0,4 3/ QSyetric Ripplesa#e ripples Oscilation ropples
(?0,4 3V 3/ -Asyetric Ripples
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P t d iti l
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Post-depositionalDeforational structures
Skums Skides
Cjn~jkute kaminatijn Cjn~jkute eddin
Recument qjresets jad structures
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2;!" -0 Xl;!" &2*!" Cjn~jkute eddin
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2 !" g *!"Cjn~jkute kaminatijn
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Sjqtsediment deqjrmatijn indicates skumin jr cjmressijn jqkayers eqjre cjmkete kitviqicatijn
iscellaneous structures
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iscellaneous structures7+J4 3K+2 03JK
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BIIIG Sand dyes structures Q:!" 8"g %
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Svrinae cracs*!"
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iscellaneous structures7+J4 3K+2 03JK
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BIIIG S d d t t Q !" 8" g %
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Crjsssectijns jq mudcrac qikks qrjmtve Middke rdj~ician St auk }rjujq tve centrak Aakacvians Njte tvat
tve cracs cjntain se~erakeneratijns jq sediment qikks itv amicrjstratiravy rekatake tjj~erkyin kayers Tvese jser~atijnsdemjnstrate tvat tvese cracs erejen at a sedimentair jr sedimentater surqace a numer jq times andtvat tvese cracs cjukd njt va~eqjrmed qrjm uard inectijn jqsediment
BIIIG Sand dyes structures Q:!" 8"g %
xio!enic sedientary structures
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xio!enic sedientary structures+3 3K+2 03JK
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xio!enic sedientary structures
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xio!enic sedientary structures+3 3K+2 03JK
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Synsedimentary cjncretijns BenecjntemjranejuscjncretijnsGjstsedimentary cjncretijns BEienic cjncretijnsG
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Stykjkites kj amkitude
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Stykjkites j svae
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a~y tj crinked qine kaminae cjmjsed
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a~y tj crinked qine kaminae cjmjsedjq cjukets jq rainstjne kayersBdarG anddjkjmitic mudstjne kayersBkivtG UerCamrian Cjnjcjcveaue imestjne jqtve centrak Aakacvians
kanar kaminaeBreater tvan fmm tvicG and tvin edsde~ekjed in djkjmite mudstjne jer rjterjjicittenjjm Djkjmite amerskey asin estern Austrakia
jcet niqe kjer keqt center is arjimateky mm kjn
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Cjn~jkute qjkdin in crinked kaminatedmudstjnes qrjm tve Uer SikurianTjnjkjay jrmatijn estern Marykand
Smakk strjmatjkitic ijverm encased intvin eds jq carjnate mudstjne tvatend arjund tve ijverm qrjm jtv aj~eand ekj Aqqected eds tvin katerakkyaj~e and ekj tve ijverm and svjincreasin dis and tvicnesses djn tve
sides jq tve ijverm eds asre tvicestakjn tve qkans jq tve ijverm and tvinkaterakky as ekk Uer CamrianCjnjcjcveaue imestjne esternMarykand
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a~y tj crinked kaminite cjmjsed jq cjukets jqekjidak kime rainstjneBdarG and djkjmitemudstjneBkivtG Tve kaminatijn is interreted as due
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mudstjneBkivtG Tve kaminatijn is interreted as duein art tj tve sediment train and indin jqcyanjacteriak surqace mats je~er njte tve tvreederessijnqikks cjmjsed jq qine sandsied ekjidakrainstjne at keqt centerBarrjsG Tvese are interreted
as traed edkjad and njt tve resukt jqcyanjacteriak train Secimen qrjm tve UerCamrian Cjnjcjcveaue imestjne esternMarykand
Cjntinujus isjacvjus mudstjnekaminae itv radiak crystak saryssearated y detritak ekjidakkaminae Tve isjacvjus mudstjnekaminae may e ~ery qinekycrystakkine cvemicak reciitates
Strjmatjkite qrjm tve Camrianaterqjk jrmatijn CanmjreAkerta iekd jq ~ie arjimateky'mm
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Strjmatjkites nuckeated jn qkat intrackasts jqkanar and crjssstratiqied ekjidakrainstjne Uer Camrian Cjnjcjcveaueimestjne estern Marykand iekd jq ~iearjimateky 1cm
Djkjmitic strjmatjkitic ijverm qrjm tvejer rjterjjic Taktveikei jrmatijnetvei }rju Njrtvest Territjries Cjinin keqt center is arjimateky mm indiameter
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eddin kane ejsure jq djkjmitic cjkumnarstrjmatjkite qrjm tve jer rjterjjic Taktveikeijrmatijn etvei }rju Njrtvest Territjriesiekd jq ~ie arjiateky 1|incves
eddin kane ~ie jq urrjs disrutinUer Camrian djkjmitic mudstjneqrjm tve }atesur jrmatijn jq centrak
ennsyk~ania iekd jq ~iearjimateky 1'cm
Tvis vjtjrav svjs an ejy
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imrenated cjre jq intertidak jnddejsits qrjm tve mjderncarjnate tidak qkats jq njrtvestAndrjs Iskand Tvis cjmketekyijturated teture as acvie~edy randjm urrjin jq ratversmakk annekids and astrjjds
In~ersekyraded isjid ed qrjmtve teee jne jq tve ermianCaitan Reeq Cjmke est
Teas ens ca ajut fmm indiameter
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Njdukar masses jq micrjcrystakkine ysumBvite atcvesGtvat rane in svae qrjm j~jid tj rectikinear itv jutkinestyicak jq ~erticakkyjriented jttjmrjn ysum sinkecrystaksBnjte tve svakkjtaik svae jq sjme jq tve rectikinearqjrmsG Ckearky tve micrjcrystakkine ysum is isseudjmjrvjus aqter kare ysum sinke crystaks jr crystakckusters It is jssike tvat an earky diaenetic stae jqdevydratijn jq jttjmrjn ysum crystaks tjmicrjcrystakkine anvydrite as qjkkjed y a qinak revydratijn
jq tve anvydrite tj micrjcrystakkine ysum Dar interkayersare cjmjsed jq detritak ysum rains jq ranuke tj sandsie Mijcene Sjkqiqera Series Siciky
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