Asked | Open questions | Answered Points Date Pair Term / Answer given Level Status Gloss 4 Apr 12 '08 eng>ara stromatolites الرقائق الكلسية الطحلبية pro closed ok - Oct 15 '07 eng>ara geological marker layer طبقة جيولوجية واصمة/واسمة/مُرشدة pro closed ok Asked | Open questions | Answered