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3 years ago in Regional Geology By Mehvish

Does anyone know some information about "Formação Casal da Lapa" in Portugal?

I'm working on the stratigraphy of the Beira region, and this formation name appears in local legend but isn't in the main national stratigraphic lexicons. Before planning fieldwork, I'd like to know if it's a Quaternary cover, a Mesozoic unit, or something else. Any pointers to Portuguese technical reports or theses would be immensely helpful.

 

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By Vishal Answered 1 year ago

Based on my fieldwork in central Portugal, I believe you're likely dealing with a Cenozoic sedimentary cover unit. The name often refers to local, poorly consolidated deposits clays, sands, and gravels mapped over the Paleozoic basement. I would recommend consulting the old "Carta Geológica de Portugal" sheets at 1:50,000 scale for the Pampilhosa da Serra area (Sheet 19-D) for the original description. These units are frequently Tertiary to Quaternary basin-fill or terrace deposits. Your best bet is to cross-reference that old mapping with more recent thesis work from universities in Coimbra or Lisbon, which may have refined its age using geomorphology or limited fossil content.

 

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