budaa choona patthar

budaa choona patthar paschim texas key uchch maidanon aur paar-bhoo-bhaag kshetron mein aur dakshini nyu maxico mein ack bhoogarbhiya gathan haye, jiska star dair seey cretaceous taka vaapas jaataa haye. terrosor key avashesh una jeevashmon mein seey hain joe gathan seey baramad kiye gaye hain.
varnan.
budaa choona patthar ack ghanaa safed seey peela chakchake choona patthar haye jisamen kaee calcite nasein hain joe apani lohe kii matra key kaaran peele yaa gulabi rung kii hoe jaati hain. sudur paschimi texas mein, yeh gathan dell riyo gathan parr nirbhar kartaa haye aur eagle ford samooh dwara parivartit kiya jaataa haye. kull motai lagbhag haye. trance-pecos texas mein, gathan grayson gathan parr nirbhar kartaa haye aur bokvilas gathan dwara aachchhaadit hotaa haye.
badey modd vaale rashtriya udyaan kshetra mein, gathan koo teen anaupchaarik sadasyon mein vibhajit kiya gayaa haye. sabse cumm kathor microgranular gray-white choona patthar kaa hotaa haye joe ack concoidal fracture key saath toot jaataa haye. beach kaa sadasya lagbhag ack argilasius yaa marley nodular gray-white choona patthar kaa hotaa haye. oopari sadasya choona patthar taka hotaa haye joe nichale sadasya key samaan hotaa haye.
jeevaashm.
foraminifera kharaab roop seey sanrakshit hain, lekin isamen "globgirina" shamil hoe sakata haye. gastropods, kuchh "griffia" seep, aur dwi-pakshiya "alectronia carinata" bhee gathan mein paae gaye hain. badey modd vaale rashtriya udyaan key poorv mein prachur matra mein dwi-pakshiya jeevaashm paae jaate hain. 
texas key hays county mein exposure seey "terodectyloidia", "ornithocheiroidia" aur "ornithocheiridae" key jeevaashm avashesh mille hain.
aarthik sansaadhan.
budaa choona patthar ack mahatvapurna petroleum jalaashay haye jiska paaramparik urdhvaadhar drilling key madhyam seey dashakon seey dohan kiya jaa rhaa haye. abb iska upayog kshaitij aur asantulit drilling jaisi takneekon kaa upayog karke kiya jaa rhaa haye. jabaki urdhvaadhar kuein gathan kii sarandhrata (6 pratishat taka) parr nirbhar they, kshaitij kuein gathan mein praakritik urdhvaadhar fracture kii pranali kaa dohan karate hain.
jaanch kaa itihas.
iss gathan koo mool roop seey shole creak choona patthar naam diyaa gayaa thaa, lekin iss naam koo pahale seey hii rakhaa gayaa thaa, aur gathan kaa naam badalkar budaa choona patthar curr diyaa gayaa thaa.doubleu. 1900 mein waghan. 1935 taka, gathan koo vashita samooh mein shamil kiya gayaa thaa.

