Hearth - Archaeological Features

Archaeological Features

In archaeology, a hearth is a firepit or other fireplace feature of any period. Initial usage refers to a place of warmth, heat, or fire, or 'heat of earth'. Hearths are common features of many eras going back to prehistoric campsites, and may be either lined with a wide range of materials like stone or left unlined. Hearths were used for cooking, heating, and processing of some stone, wood, faunal, and floral resources. Occasionally site formation processes—e.g., farming or excavation—deform or disperse hearth features, making them difficult to identify without careful study.

Lined hearths are easily identified by the presence of fire-cracked rock, often created when the heat from the fires inside the hearths chemically altered and cracked the stone. Often present are fragmented fish and animal bones, carbonized shell, charcoal, ash, and other waste products, all embedded in a sequence of soil that has been deposited atop the hearth. Unlined hearths, which are less easily identified, may also include these materials. Because of the organic nature of most of these items, they can be used to pinpoint the date the hearth was last used via the process of radiocarbon dating. Although carbon dates can be negatively affected if the users of the hearth burned old wood or coal, the process is typically quite reliable. This was the most common way to cook, and to heat interior spaces in cool seasons.