The word Liasic is misspelled against Liassic, a noun meaning "Same as Lias."
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Liassic has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings lia & ic which should not be misspelled with single 'S'
Wrong Spelling:  lia-s-ic 
Correct Spelling:  lia-ss-ic 
Find more wrongly spelled words of Liassic to spell it well.