dasar stratigrafi

7/23/2019 Dasar Stratigrafi

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FAUNAL SUCCESSIONurutan fauna (Abbe, 1777)

Fossils difer according to theirgeological ages; ossils in lower

ormations are unlike those in higherbeds (Schenk, 1940, opcit, p 1!"#$Fossils aunas and %oras succeed oneanother in a de&nite and determinableorder ('nthon, opcit,p)9$

*rinsip ini ang mendasari konsepbiostratigra& ang berkembangmen+adi chronostratigra&


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STRATA IDENTIFIED BY FOSSILS(Smit, 1!1")

he practicabilit o thus distinguishing so great a -ariet omaterials in the earth, as successi-el terminate at thesurace being admitted, and their courses delineated in thelarge map o the Strata +ust published; . ma nowcon&dentl proceed with a general account o thoseorgani/ed ossils which . ound imbedded in each Stratum,and which &rst enable me more particularl to distinguishone Stratum rom another (Smith 1)1,p$

2Similar strata contain similar ossils3 (smith,1)1!$

Strata can be distinguished b their characteristic

ossils (oodord 19#", op cit, p"5; Schenck 1940,p 1!"451!""$

6en+elaskan bahwa para ahli geologi pada awalnamenaruh minat ang sangat besar pada batuan,lapisan serta hubungan lapisan di lapangan *adaperkembanganna manusia mulai tertarik pada urutanlapisan dengan isi osilna


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Cr#$$ Cuttin%Re&ati#n$i'$

(Car&e$ Le&&, 1!*) he thing doing the cutting is ounger

than the rock being cut


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UNIFOR+ITARIANIS+(UTTON, 17!-)

.n e7amining things present, we ha-e data romwhich to reason with regards to that which is tohappen hereater hereore, upon the

superposition that the operations oh nature aree8uable and stead, we &nd, in naturalappearances, means or concluding a certainportion o time to ha-e necessaril elapsed in theproduction o these e-ents o which we see theefects (:amanperm umumna panas berbeda dengan /amansebelumna, ?arbon ang bersiat lembab,namun proses ang membentuk semua ge+alageologi dapat dikatakan sama


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.ame$ utt#n (17/"0177

CE) Scottish geologist

@e-eloped the

laws o geolog Aonsidered the

Father o 6odernBeolog


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UTTON2S DOCTRINE OFUNIFOR+ITY

( 3&afair,1!*/ ) 2'mid all the re-olutions o the globe the econom o

=ature has been uniorm, and her laws are the onl thingthat ha-e resisted the general mo-ement he ri-ers and

the rock, the seas, and the continents ha-e been changedin all their parts; but the laws which describe thosechanges, and the rules to which the are sub+ect, ha-eremained in-ariabl the same3

he present is the ke to he past

=o -estiges o the beginning, no -estiges o the end C-erthing changes, onl the law o changes does not

change *erubahan ter+adi sangat lambat perubahan besar *roses di bumi ter+adi secara berulang D ulang siklus

Eermacam +enis batuan


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FACIES ( 4ree$&, 1!")

he term acies designate the diferences,whate-er the ma be between ormations o thesame age; the diferences ma be either inpetrograph composition, resulting the nature othe substances deposited, or paleontologdiferences, resulting rom the li-ing condition othe animal and plant ossils

Facies are then de&nitel the diferent kinds o

deposits, sedimentar or other, which can beproduced simultaneousl, at a gi-en geologicalmoment, +ust as is the case at the present time


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5ALTER LA5 6 UU+5ALTER

( 5a&ter, 1!8 ) .n other words acies that occur in a conormable -ertical

core se8uences were ormed in laterall ad+acentdepositional en-ironment

.t is especiall important to note as 6iddletown ( 19!# $pointed out, that althers Gaw applies onl to successionwithout ma+or erosion or non depositional breaks hereoreit is e7tremel important to recogni/e such erosion or nondepositional breaks in -ertical se8uences

Fasies ang pada dasarna berarti perbedaan ciripaleontologi dan batuan pada umur ang sama, dalamprektek pengenalanna di lapangan sulit diker+akan pada

daerah tropis :al ini karena terbatasna bentabgsingkapan


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LITOSTRATI4RA3IC UNITSATUAN LITOSTRATI4RAFI ( 3#9e&&, 1!!!

) he discrimination between rock D

stratigraphic units is essential or theclassi&cation and nomenclature o

sedimentar rocks *erkembangan stratigra& selan+utna

menun+ukkan pandangan manusia terhadaphal ang bersiat praktis, terapan 'hlipertama dalam hal stratigra& ang

menga+ukan pentingna terapan adalah*owell ( 1))) $ @irektur S' BeologicalSur-e di 'merika

Habaran lebih lan+ut dapat dibaca pada babSandi Stratigra& .ndonesia


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