Ordovician nthawi ya Paleozoic Nyengo: nyama ndi zomera

Ordovician (dongosolo) - wosanjikiza yachiwiri m'dambo wa gulu Paleozoic mu zochitika za nthaka ndi miyala la dziko. Dzinali linachokera ku fuko wakale wa Ordovician. Iwo ankakhala ku Wales, UK. Nthawiyi chimatengedwa ngati dongosolo wodziimira. Izo zinakhala zaka mamiliyoni faifi handiredi zapitazo inatenga zaka miliyoni sikisite. nthawi allocated kwambiri zilumba lero ndi m'maiko monse.

Nthaka Ordovician System

Kumayambiriro kwa nyengo ya North ndi South America akhala pafupi Europe ndi Africa. Australia anali pafupi ndi Africa ndipo anali gawo la Asia. Mmodzi zake zili kumpoto kwa Africa, ndi zina - mu gawo la kumpoto kwa Pacific Ocean. Pa chiyambi cha Ordovician zambiri za kum'mwera a Dziko Lapansi wotanganidwa Africa Gondwana. Amaphatikiza panopa America South, South Atlantic Ocean, Australia, Africa, North Asia ndi Indian Ocean. Pang'onopang'ono, Europe ndi North America (Lawrence) akhala osiyana Chrixitu. Nyanja msinkhu ndi kuwuka. Ambiri a dziko linali mu M'madera a zitunda ofunda. Mu Gondwana anali migodi, ndipo kenako kuwundana chokhala. Mu America South ndi kumpoto chakumadzulo Africa anakhalabe m'dambo pansi moraines, amene anasiya nyengo Paleozoic.

Ordovician mu Arabiya, kum'mwera kwa France, Spain amakhala ndi icing. Mu Brazil ndi West Sahara kuda ayezi anapezanso. Kukula kwa malo nyanja chidzachitika Ordovician pakati. M'madera kumadzulo a North ndi South America, Great Britain, mu Ural-Mongolian lamba, mu kum'mwera chakum'mawa kwa Australia, kuda Ordovician m'dambo kufikira mamita zikwi khumi. Mu malo awa, panali zambiri mapiri, chiphalaphala anasonkhanitsa strata. Komanso chert: yaspi, ftanidy. Mu Russia nthawi Ordovician ndi kuoneka bwino pa European East, Siberia nsanja, mu Urals ndi, Novaya Zemlya, pa Chatsopano Siberia Islands, pa Taimyr Peninsula ku Kazakhstan ndi ku Central Asia.

Nyengo zikuchitika ku System Ordovician

Mu nyengo Ordovician unagawidwa mitundu inayi: otentha, kotentha, subtropical, nival. Mu Ordovician malemu yozizira. M'madera otentha kutentha waponya ndi madigiri asanu, m'madera otentha - khumi. Kwambiri ozizira kwambiri mu M'madera a zitunda mkulu. The Middle Ordovician panali otentha nyengo, poyerekeza ndi nyengo m'mbuyomu. Izi zikutsimikizira yogawa laimu.

Mchere mu System Ordovician

Mwa mchere anapanga mu nthawi ino, anachira mafuta ndi gasi. Makamaka zambiri miyala ya imeneyi North America. Komanso anatsindika gawo mafuta shale, phosphorite. madipoziti awa zinangokhalako miyala imene chiphalaphala anali nawo. Mwachitsanzo, mu Kazakhstan pali miyala ya miyala manganese ndi barytes.

Nyanja Ordovician ndi

The Middle Ordovician pali kukula kwa malo apanyanja. M'nyanjayo amakhala m'munsi. kusintha kwambiri bwanji kudzikundikira wosanjikiza lalikulu matope, amene ankaimira ndi wakuda sludge. Amakhala kuphulika phulusa, clastic miyala ndi mchenga. nyanja osaya inali ku zimene tsopano ndi North America ndi ku Ulaya.

The nyama ndi zomera za Ordovician ndi

Ndere mu nthawi Ordovician sizinasinthe poyerekeza nthawi yapita. Zikuoneka zomera woyamba kwambiri padziko lapansi. Iwo makamaka umaimiridwa ndi ndere.

Moyo mu madzi mu nthawi osiyanasiyanawo ndithu. N'chifukwa chake amaona zofunika kwambiri mu mbiri ya Dziko Lapansi. Anapanga mitundu ikuluikulu ya zolengedwa za m'nyanja. Pali nsomba yoyamba. Only ang'ono kwambiri, pafupifupi zisanu masentimita. Pa nyanja zolengedwa anayamba kuoneka chimakwirira zovuta. Izi zinachitika chifukwa chakuti zamoyo panauka pamwamba m'dambo pansi ndi kudyetsa pamwamba m'nyanjayo. Koposa pali nyama kudyetsa m'nyanjamo. Magulu ena a inakhala zayambika, ena anayamba kukhala. Kumapeto kwa Ordovician kuoneka zamoyo peresenti. Kuchokera echinoderm nyanja thovu anaonekera, nyanja kakombo. Panopa, zamoyo monga maluwa nyanja ndi nyenyezi nyanja komanso kulibe.

Pamwamba maluwa nyanja amayandama gulu la modabwitsa - ichi ndi chithunzi chokongola nthawi zakale. eni amagwiritsidwa adayamba kumira umoyo wawo. Gastropods ndi elasmobranch umaimiridwa ndi ambiri mitundu. Mu chitukuko Ordovician cephalopods chetyrehzhabernyh amapezeka - ndi wosazindikira oimira Nautiloidea. Tizilombo timeneti tsopano tikukhala mu kuya kwa nyanja ya Indian Ocean. Tikafika oimira wakale wa anthu awa wamoyo anali molunjika, monga kuyenera zipolopolo yokhota kumapeto a mitundu ano nautilus. ngale awa anali mdani moyo.

nyama Chatsopano mu nthawi iyi anali graptolites. Iwo kubereka ikuphukira. Graptolites madera analenga. Poyamba, iwo ananenedwa coelenterates, tsopano - kuti krylozhabernym invertebrates. Panthawi imeneyi, graptolites moyo, koma pali achibale awo lakutali. Mmodzi wa iwo amakhala ku Nyanja North - ndi Rhabdopleura normanni. Komanso, pali gulu la zamoyo zimene zimathandiza ngale kumanga am'nyanja. Iwo anaonekera pa nthawi ino - izo bryozoans. Alipo tsopano, ngati zamoyo izi pa tchire wokongola zingwe. Kuti zinachitika aromorphoses Ordovician ku zamoyo zina.

Anthu a nyanja

The sandstone mu Colorado zidutswa nsomba jawless anapezeka. Zotsatira ndi zatsalira ena zolengedwa peresenti, ofanana nsombazi a. Mafupa amasonyeza kuti Ordovician jawless osiyana mitundu masiku ano.

Nyama choyamba kuti anali nawo mano - izo conodonts. Zilombozi ofanana ndi ziphuphu zakumaso. nsagwada awo ndi osiyana nsagwada za zamoyo. Asayansi anayesedwa mitundu mazana asanu ndi zamoyo amene ankakhala mu nyanja mu nthawi ya pamwamba. The chithunzithunzi ozizira anali mmodzi mwa zifukwa kutha kwa mitundu. nyanja osaya kuti chidikha, ndi nyama ya m'nyanja zinafa. The chifukwa womwewo anamvetsetsa ndi zomera nthawi imeneyi.

Chifukwa kutha kwa zamoyo nyama

Pali Mabaibulo ambiri a misa kutha kwa zolengedwa:

1. Mkangano Popanga madzi a gamma cheza mwa dongosolo la zowalitsa.
2. Kugwa kwa matupi lalikulu danga. zidutswa awo kapena meteorites anapeza lero.
3. The chifukwa cha mapangidwe machitidwe phiri. miyala ndi ikuwombedwa ndi mphepo ndi mu nthaka. Chifukwa cha njira izi ndi otsika mpweya, kumene kumakhudza kwanyengo ndi.
4. Kupita Gondwana kwa Pole South zinachititsa kuti chithunzithunzi ozizira, ndiyeno zaka ayezi, kuchepetsa wa madzi m'nyanja.
5. The machulukitsidwe wa nyanja zitsulo dziko. Anaphunzitsidwa zomera kuti nthawi lili milingo okwera zosiyanasiyana zitsulo. Madzi poyizoni zinachitika zitsulo.

Amene Mabaibulo zikuoneka zodalirika, ndipo n'chifukwa nyama zinatha Ordovician, panopa silidziŵika.