58 mm, The Azuara deals impact structure. 240 gr,

58 mm, The Azuara impact structure. 240 gr/8,5oz.

The roughly 40-km diameter Azuara impact structure (Fig. 1) is located in northeast Spain 50 km south of Zaragoza (see Azuara from space). From stratigraphic considerations, its age is estimated to be Upper Eocene or Oligocene (Fig. 2). Except for very small magmatic intrusions, the target was purely sedimentary, which is a rare case with very large impact structures. The target was composed of the roughly 10 km thick Paleozoic core of the Iberian chain and the Mesozoic cover overlain by Tertiary molasse sediments of probably 1000 – 2000 m thickness. This prominent deals thickness of more or less loosely bound sediments and the carbonate rocks prevailing in the sedimentary sequence are related to many peculiarities of the Azuara structure such as relics of carbonate melt, a special facies of the impact ejecta, and distinct breccia dikes.

Young post-impact sediments widely hamper the investigation of the central part of the Azuara structure. Therefore, most outcrops concentrate on the rim region (Fig. 2) where they are very abundant enabling excellent insight into the geology of the impact process.

Anton Artemev - IMCA 9900
INTERNATIONAL METEORITE COLLECTORS ASSOCIATION.

shipping from USA