A diagram showing the various components of ceremonial substructure <a href="https://en.wikipedia.org/wiki/platform_mound" class="extiw" title="en:platform mound">platform mounds</a> used by the <a href="https://en.wikipedia.org/wiki/Mississippian_culture" class="extiw" title="en:Mississippian culture">Mississippian</a> and <a href="https://en.wikipedia.org/wiki/Plaquemine_culture" class="extiw" title="en:Plaquemine culture">Plaquemine cultures</a>, including multiple layers of mound construction, mound structures such as temples or mortuaries, ramps with log stairs, prior structures under later layers, multiple <a href="https://en.wikipedia.org/wiki/terraces" class="extiw" title="en:terraces">terraces</a> and intrusive burials.
<a href="//commons.wikimedia.org/wiki/User:Heironymous_Rowe" title="User:Heironymous Rowe">Herb Roe</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>