▁elements . ▁The ▁he address ▁of ▁the ▁mask ▁represents ▁a ▁cro cod ile . ▁These ▁mask s ▁are ▁constru ed ▁of ▁stone ▁arm ature ▁covered ▁with ▁thick ▁st u cco ▁into ▁which ▁the ▁details ▁are ▁car ved . ▁The ▁mask s ▁date ▁to ▁the ▁late ▁fifth ▁to ▁the ▁early ▁sixth ▁century . ▁At ▁Lam ana i , ▁cer emon ial ism ▁was ▁strongly ▁developed , ▁providing ▁evidence ▁of ▁r uling ▁authority ▁with ▁tight ▁control ▁over ▁the ▁popul ace . ▁ ▁At ▁the ▁large ▁temple ▁there ▁was ▁a ▁single ▁ball ▁court , ▁where ▁an ▁offering ▁had ▁been ▁placed ▁under ▁its ▁giant ▁central ▁marker . ▁A ▁l idd ed ▁bow l ▁contained ▁ 1 0 0 g ▁of ▁cry st all ine ▁h emat ite , ▁ 1 9 ▁g ▁of ▁c inn ab ar ▁in ▁a ▁mini ature ▁vessel , ▁and ▁other ▁objects ▁such ▁as ▁j ade , ▁shell , ▁and ▁p ear l , ▁all ▁at op ▁of ▁a ▁pool ▁of ▁mer cur y . ▁Pre viously ▁mer cur y ▁had ▁been ▁found ▁at ▁Cop an , ▁Qu ir igua , ▁and ▁at ▁Kam inal ju yo ▁and ▁lake ▁Amt it lan , ▁but ▁not ▁in ▁such ▁large ▁quantity . ▁This ▁large ▁amount ▁of ▁mer cur y ▁found ▁at ▁the ▁site ▁of ▁Lam ana i ▁had ▁been ▁probably ▁collected ▁for ▁rit ual ▁use . ▁Cer am ics ▁were ▁also ▁found ▁at ▁the ▁site ▁and ▁gradually ▁adopted ▁new ▁styles . ▁Unfortunately , ▁by ▁the ▁end ▁of ▁the ▁Classic ▁period , ▁the ▁norm ▁here ▁for