
arcos

arcos () allengil arcosic manalkkall oru detrittal sedimentari paarayaan, prathyekichu kuranjathu 25 sathamaanam feldspar adangiya oru tharam manalkkall. feldspar kondu sambannamaaya manalaanu arcosic manal, athinaal aarkkosinte saadhyathayulla mungamiyaanu. 
quarts saadhaaranayaayi pradhana dhaatu gadakamaanu, chila mica palappozhum kaanapedunnu. daathukkalude alavinu purame, paara shakalangalum oru pradhana gadakamaayirikkaam. arcosil saadhaaranayaayi cheria alavil kaalsait simant adangiyirikkunnu, ithu nerppicha hydrochloric aasidil cheruthaayi (phiss) puranthallaan kaaranamaakunnu; chilappol simantil irumbu ooksaidum adangiyirikkunnu. 
arcosinu saadhaaranayaayi chaaraniram muthal chuvapp vare niramaan. oru arcos undaakkunna manal daanyangal nerthathu muthal valare parukkan vare aakam, pakshe skeyilinte parukkan attathekku pravanatha kaanikkunnu. kidakkakal palappozhum drishyamaanengilum, arcosil fossilukal apoorvamaanu, kaaranam athu roopappedunna nikshepa prakriyakal kaaranam.
praadhamikamaayi quarts, feldspar (manal enna nilayil 'grass' ennu vilikkunnu) enniva chernna feldspar sambannamaaya ignius allengil metamorphic, saadhaaranayaayi graanaitik paarakalude kalavastha vyathiyaanathil ninnaan arcos saadhaaranayaayi roopappedunnathu. eee avashishtangal vegathil allengil/allengil feldspar kaaryamaaya raasa kaalaavasthaykkum vighadanathinum vidheyamaakaatha thanutha allengil varanda anthareekshathil nikshepikkanam; athinaal arcosine "tekstarli inpecture" sedimentari roock ennu namakaranam cheiyunnu. graanait bhoopradesangalil ninnu labhikkuna samyojitha nikshepangalumaayi arcos palappozhum bandhappettirikkunnu, ithu palappozhum graanait bhoopradeshangalude sameepathulla asamathvangalkku mukalil kaanapedunnu.
madhya australian inselberg uluru (ayyezhs paara) amadius thadatthil nikshepichirikkunna avasaanathe neoproterosoic/cambrian arcos chernnathaanu.