38 Sequences of basaltic pillow lavas that transition upwards with systematic gradation from pillow 39 fragment breccias to fluidal bomb-bearing breccia to bomb-bearing lapilli tuffs are common at 40 Askja volcano, Iceland. Based on the detailed textural investigation of three of these sequences, 41 we argue that they record temporally continuous transition from effusive to explosive products 4...

We present the stratigraphy, lithology, volcanology, and age of the Acahualinca section in Managua, including a famous footprint layer exposed in two museum pits. The ca. 4-m-high walls of the main northern pit (Pit I) expose excellent cross sections of Late Holocene volcaniclastic deposits in northern Managua. We have subdivided the section into six lithostratigraphic units, some of which we c...

The release of hatchery-reared fish fry for restocking is important the enrichment fishery resources; however, effective evaluation success rate marking such challenging. We exposed juvenile crucian carp (Carassius carassius) to a single concentration SrCl2·6H2O 5 d and evaluated efficiency Sr otoliths (sagittae, asterisci, lapilli) using an electron probe micro-analyzer. signatures formed peak...

We investigate the six-state clock model with nearest-neighbor interactions on the square lattice. We obtain the density of states of the finite systems up to L=28 using the Wang-Landau sampling. With the density of states and the Fisher zero approach, we successfully find two different critical temperatures 0.632(2) and 0.997(2) for the clock model. It seems that this study supports the recent...