72号土墩(平顶金字塔)位于美国伊利诺伊州克林斯维附近的卡霍基亚遗址。这座脊顶形金字塔位于僧侣金字塔以南大约850米。在卡霍基亚历史初期,72号和96号土墩位于一个直径126米的仪式庆典区域。该区域被一圈共48根直立的木柱环绕,这样的木柱圈今天被称作“太阳历栅栏”。这些柱子的年代被测定为公元950年。考古研究发现,其中4根柱子位于东西南北这4个主方向,而标示东、西方向的两 Mound 72 (Flat-top Pyramid) is located at the Carhochia site near Klinsvik, Illinois, USA. This ridge-shaped pyramid is about 850 meters south of the monastery pyramid. At the beginning of Cahokia’s history, mounds 72 and 96 were located in a ceremonial celebration area 126 meters in diameter. The area is surrounded by a total of 48 upright wooden posts in a circle, which is today called the “Solar Calendar Barrier.” The age of these pillars was measured as the year 950. Archaeological research found that four of these columns are located in the four main directions of East, West, South and North, while the two