Calcite-dominated laminar features (e.g., laminar caps, fracture fillings, clast pendants, and more) in calcic and petrocalcic horizons exhibit a range of morphologies and compositions indicative of soil solution chemistry at the time of crystallization and, by proxy, of climate or environmental conditions more broadly. Unfortunately, as demonstrated by previous authors, pedogenic laminae cannot be presumed to grow in steady vertical succession, complicating their utility for high-resolution paleoclimatic reconstruction or geochronology. Additionally, the mineralogy and micromorphology of laminar features in calcic and petrocalcic horizons may vary from site to site, in some cases provoking competing hypotheses regarding the role of subaerial exposure, root mats or cyanobacterial mats, textural contrasts, and/or other factors or processes in their genesis. This study describes: (1) a detailed micromorphological and compositional study of pedogenic carbonate laminae in petrocalcic soils of the Southwestern U.S.A. to assess dissolution, reprecipitation, and overgrowth events, and (2) laboratory experiments to synthesize discrete carbonate laminae and other pedogenic features from controlled solutions over simulated time. The morphology of calcite, and of palygorskite, sepiolite, silica, and other common accessory minerals in laminae are used alongside experimental results to constrain the degree of variation in laminae between distinct pedofeatures as well as within features of the same type. This study details the implications of laminar morphology, mineralogy, geochemistry, open-system behavior, and other considerations for paleoenvironmental analysis of carbonate paleosols as well as extant calcic and petrocalcic horizons.