資源描述：
《一種罕見的化石記錄(a rare fossil record)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫。
1、一種罕見的化石記錄(ARareFossilRecord) thepreservatinfebrsanduvenilesisarateurreneinthefssilrerdthetin,deliateseletnsareusuallsatteredbsavengersrdestredbeatheringbefretheanbefssilizedihthsaurshadahigherhanefbeingpreservedthandidterrestrialreaturesbeause,asarineanials,thetendedtliveinenvirnentsless
2、subettersin still,theirfssilizatinrequiredasuiteffatrs:aslratefdeafsfttissues,littlesavengingbtheranials,alafsifturrentsandavestubleandarraasallbnes,andfairlrapidburialgiventhesefatrs,seareashavebeeatreasurfell-preservedihthsaurfssils thedepsitsathlzaden,geran,presentaninterestingasefra
3、nalsistheihthsaurreainsarefundinbla,bituinusarineshalesdepsitedabut190illinearsagvertheears,thusandsfspeiensfarinereptiles,fishandinvertebrateshavebeenreveredfrthesers thequalitfpreservatinisutstanding,buthatisevenreipressiveisthenuberfihthsaurfssilsntainingpreservedebrsihthsaursithebrsh
4、avebeenreprtedfr6differentlevelsftheshaleinasallareaarundhlzaden,suggestingthataspeifisiteasusedblargenubersfihthsaursrepeatedlvertie theebrsarequiteadvanedintheirphsialdevelpent;theirpaddles,frexaple,arealreadellfrednespeienisevenpreservedinthebirthanalinadditin,theshalentainsthereainsf
5、annebrnsthatarebeteen20and30inheslng haretheresanpregnantfealesandungathlzadenhenthearesrareelsehere?thequalitfpreservatinisalstunathedandquarrperatinshavebeenarriedutarefullithanaarenessfthevaluefthefssilsbutthesefatrsdntauntfrtheinterestingquestinfhthereaetbesuhanentratinfpregnantihths
6、aursinapartiularplaeverlsettheirtiefgivingbirth
