Siccar Point yog pob zeb promontory hauv lub nroog Berwickshire nyob rau sab hnub tuaj ntawm Scotland. Nws yog nto moo nyob rau hauv keeb kwm ntawm geology rau Hutton's Unconformity pom nyob rau hauv 1788, uas James Hutton suav hais tias yog cov pov thawj tseeb ntawm nws txoj kev xav tsis sib xws ntawm kev loj hlob geological.
Dab tsi yog qhov tseem ceeb ntawm Siccar Point?
Hauv xyoo 1788, James Hutton thawj zaug pom Siccar Point, thiab nkag siab nws qhov tseem ceeb. Nws yog qhov tseem ceeb tshaj plaws ntawm ntau qhov kev tsis sib haum xeeb uas nws tau pom hauv Scotland, thiab tseem ceeb heev tseem ceeb hauv kev pab Hutton piav qhia nws cov tswv yim txog cov txheej txheem ntawm lub ntiaj teb.
Siccar Point qhia li cas rau Hutton?
Lawv mam li caij nkoj los ntawm Dunglass Hlawv sab hnub tuaj raws ntug dej hiav txwv nrog tus kws tshawb fawb Sir James Hall of Dunglass. Lawv pom qhov sib lawv liag hauv pob tsuas hauv qab St. Helens, tom qab ntawd mus rau sab hnub tuaj ntawm Siccar Point pom qhov Hutton hu ua " daim duab zoo nkauj ntawm qhov kev sib tshuam no ntxuav tawm ntawm hiav txwv".
Dab tsi tshwm sim ntawm Siccar Point?
Lub Silurian strata ntawm Siccar Point tsim nyob rau hauv Iapetus Dej hiav txwv, ib tug ntev-ntev dej hiav txwv uas cais ob sab av loj. Raws li lub hiav txwv Iapetus kaw, lub hiav txwv pem teb tau subducted hauv qab sab qaum teb sab av loj thiab ib co ntawm lub hiav txwv pem teb sedimentary pob zeb twb buckled thiab compressed.
pob zeb tsim li cas ntawm Siccar Point?
Cov kab ntsug ntsug ntawm Siccar Point yogSilurian greywacke, lub pob zeb grey sedimentary tsim muaj kwv yees li 425 lab xyoo dhau los thaum sib tsoo daim hlau tsim lub siab loj heev uas hloov cov pob zeb mus rau pob zeb.
