Micromorphological methods shed light on ancient Neanderthal hearth remains

Words matter. Images matter. The Scientific Inquirer needs your support. Help us pay our contributors for their hard work. Visit our Patreon page and discover ways that you can make a difference. http://bit.ly/2jjiagi

Ancient fire remains provide evidence of Neanderthal group mobility and settlement patterns and indicate specific occupation episodes, according to a new study published in PLOS ONE on by Lucia Leierer and colleagues from Universidad de La Laguna, Spain.

Most paleolithic household activities are thought to have taken place around hearths or fires. The author of the present study chose to examine the Middle Paleolithic site El Salt in Spain, which contains eleven well-preserved and overlapping open-air hearth structures. It was previously unclear whether these hearths were formed during successive short-term site occupations or fewer, longer term occupations.

The authors examined the micromorphology of the different layers within the hearth structures to assess occupation timings within the study unit and conducted both a lipid biomarker analysis and isotope analysis to gain information about potential food and fuel.

The results of the analyses show stratified hearths built on multiple different topsoils over different periods of time. The burned organic matter present at the El Salt hearths is rich in herbivore excrement and flowering plant residues. The presence of flint and bone shards, as well as conifer wood charcoal collected from trees not present at the site, provide evidence of limited activity at the site.

The authors suggest these data indicate at least four successive short-term Neanderthal occupations separated by relatively long periods of time, potentially based around the seasons.

The authors suggest their molecular and micromorphological methods would work well at similar paleolithic sites where fires were built. Their findings provide evidence for successive short-term Neanderthal occupations at this site, and could inform our understanding of Neanderthal group mobility and settlement more generally.

Leierer adds: “Micromorphology combined with lipid biomarker analysis is a powerful approach to investigate anthropogenic combustion-related archaeological contexts from a microstratigraphic perspective which can contribute valuable information on the timing and intensity of Neanderthal occupations as well as the natural setting of the site. These are key factors of group mobility and settlement patterns.”

IMAGE SOURCE: Creative Commons

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: