遺址發(fa)現文物近千件(jian)(jian),其中陶(tao)(tao)器(qi)(qi)475件(jian)(jian),石(shi)(shi)器(qi)(qi)169件(jian)(jian),骨(gu)器(qi)(qi)六七十件(jian)(jian),銅器(qi)(qi)14件(jian)(jian)。陶(tao)(tao)器(qi)(qi)有(you)(you)(you)夾沙和硬陶(tao)(tao)兩(liang)種,前者皆手制,后(hou)者輪(lun)制,且(qie)有(you)(you)(you)花(hua)紋。陶(tao)(tao)器(qi)(qi)很少完整(zheng),其中以網墜為多。石(shi)(shi)器(qi)(qi)有(you)(you)(you)斧、錛、鑿(zao)、刀(dao)、鏃、錐、環(huan)、紡(fang)輪(lun)、磨(mo)石(shi)(shi)等。石(shi)(shi)刀(dao)全部(bu)穿(chuan)(chuan)孔(kong)(kong)(kong),有(you)(you)(you)單孔(kong)(kong)(kong)、雙(shuang)孔(kong)(kong)(kong),也(ye)有(you)(you)(you)磨(mo)槽后(hou)穿(chuan)(chuan)孔(kong)(kong)(kong)的(de)(de)。骨(gu)角(jiao)器(qi)(qi)有(you)(you)(you)針(zhen)、錐、紡(fang)輪(lun)、磨(mo)石(shi)(shi)等。石(shi)(shi)刀(dao)全部(bu)穿(chuan)(chuan)孔(kong)(kong)(kong),有(you)(you)(you)單孔(kong)(kong)(kong)、雙(shuang)孔(kong)(kong)(kong),也(ye)有(you)(you)(you)磨(mo)槽后(hou)穿(chuan)(chuan)孔(kong)(kong)(kong)的(de)(de)。骨(gu)角(jiao)器(qi)(qi)有(you)(you)(you)針(zhen)、錐、紡(fang)輪(lun)、穿(chuan)(chuan)孔(kong)(kong)(kong)獸(shou)牙、穿(chuan)(chuan)孔(kong)(kong)(kong)骨(gu)片(pian)等。銅器(qi)(qi)有(you)(you)(you)斧、鋮、刀(dao)、鑿(zao)、環(huan)、魚鉤和裝飾品,還發(fa)現半塊陶(tao)(tao)范(fan),范(fan)上花(hua)紋與一(yi)把(ba)銅斧花(hua)紋相吻合。此外,遺址中有(you)(you)(you)四(si)處發(fa)現谷物,出(chu)土時均成黑色。經有(you)(you)(you)關部(bu)門鑒定,出(chu)土谷物屬(shu)于(yu)粳稻類(lei)型。還有(you)(you)(you)大量獸(shou)骨(gu)出(chu)土。
經中國科學院(yuan)考古研究所實(shi)驗室放射性碳素測定,海門口出土圓木樁,距今已3115±90年(公(gong)元前(qian)1150±90年)。經過(guo)樹輪較正后的數(shu)據(ju)為公(gong)元前(qian)1335±155年。
海(hai)門口(kou)遺(yi)址出(chu)土文物(wu),屬銅(tong)石(shi)并用時(shi)期文化(hua),這(zhe)(zhe)一(yi)(yi)遺(yi)址的(de)(de)發(fa)(fa)(fa)現,反映(ying)出(chu)云(yun)南(nan)原(yuan)始社(she)會(hui)末期之社(she)會(hui)面貌,說明當(dang)(dang)時(shi)這(zhe)(zhe)里(li)已(yi)形成(cheng)一(yi)(yi)個(ge)濱水(shui)的(de)(de)村落,村落房屋為一(yi)(yi)種干欄建筑,與近代云(yun)南(nan)一(yi)(yi)些(xie)少(shao)數民族房屋相似(si)。遺(yi)址發(fa)(fa)(fa)現的(de)(de)器(qi)物(wu),具有(you)洱海(hai)地(di)(di)區新石(shi)器(qi)文化(hua)若干特征,無論石(shi)器(qi)或骨器(qi),都磨得整(zheng)齊精致,陶(tao)器(qi)開始出(chu)現輪制痕跡(ji),說明整(zheng)個(ge)社(she)會(hui)生(sheng)產力有(you)了飛躍(yue)的(de)(de)進步。特別值得注意(yi)的(de)(de)是,發(fa)(fa)(fa)現的(de)(de)14件銅(tong)器(qi)中(zhong)有(you)斧(fu)、刀、鑿(zao)裝飾品和(he)魚鉤(gou),還(huan)有(you)制造銅(tong)斧(fu)的(de)(de)范,標志著當(dang)(dang)地(di)(di)冶金術的(de)(de)發(fa)(fa)(fa)展。這(zhe)(zhe)些(xie)銅(tong)器(qi)雖(sui)然(ran)粗糙、簡單,但后來云(yun)南(nan)光(guang)輝燦爛的(de)(de)青銅(tong)文化(hua)是從(cong)這(zhe)(zhe)里(li)開始的(de)(de)。由于生(sheng)產工具的(de)(de)改造,農業、畜牧業和(he)漁(yu)獵(lie)均很發(fa)(fa)(fa)達。遺(yi)址中(zhong)發(fa)(fa)(fa)現的(de)(de)粳稻大概一(yi)(yi)直是遠古時(shi)期云(yun)南(nan)地(di)(di)區栽培主要稻種。從(cong)測(ce)定(ding)的(de)(de)遺(yi)址形成(cheng)時(shi)間看,當(dang)(dang)時(shi)云(yun)南(nan)剛剛跨進階級(ji)社(she)會(hui)的(de)(de)大門,而我國中(zhong)原(yuan)地(di)(di)區正處(chu)在殷商晚期。截止目前所知(zhi),海(hai)門口(kou)遺(yi)址是云(yun)南(nan)銅(tong)石(shi)并用文化(hua)早發(fa)(fa)(fa)源地(di)(di),標志著云(yun)南(nan)地(di)(di)區利用金屬的(de)(de)開始。