نتایج جستجو برای: upper red formation
تعداد نتایج: 861952 فیلتر نتایج به سال:
We introduce a new quantity, themass flux density of galaxies evolving from the blue sequence to the red sequence. We propose a simple technique for constraining this mass flux using the volume-corrected number density in the extinction-corrected UV-optical color-magnitude distribution, the stellar age indexesH A andDn(4000), and a simple prescription for spectral evolution using a quenched sta...
The Messinian (Upper Miocene) is characterized at the level of its marginal basins by development numerous carbonate platforms. This study concerns platform Boukadir region in south Chelif Basin Algeria. It composed a lower prograding rimmed and an upper aggradational homoclinal ramp resting upon Tortonian–Lower Blue Marl Formation, thickness reaches ~280 m Basin. red-algae unit uniform subhori...
Palynostratigraphy and palynofacies analyses are applied to identify transgressive-regressive sequences changes in paleoenvironment through the Middle Jurassic–Early Cretaceous succession of Ramså Basin on Andøya. The conglomerate, succeeding lacustrine-swamp deposits Hestberget Kullgrøfta members (Ramså Formation) overlying terrestrial marginal marine lower Bonteigen Member Formation), compris...
the study area is situated in the middle part of the tabas block. it contains outcrops of rocks that formed along longitudinal faults in early cimmerian orogenic phase. the basin subsided along these faults from the late triassic to early cretaceous, which include two sedimentary cycles. a sedimentary cycle, related to upper triassic to bajocian is known as shemshak group. another sedimentary c...
the upper cretaceous thick bedded succession in badamouyeh mountain in honooj area shows the late cenomanian-santonian stages. also, these deposits are well exposed in the south-west of bibihayat and south of cheshmah gaz village. in the studied section, lower and upper honooj green marls (informal) with intercalation of exogyroferous shaly limestone are overlain by thick bedded limestones and ...
Paleosols are prominent features of the Upper Triassic Chinle Group. The oldest (Carnian-age) formations of the Chinle Group (Zuni Mountains and Shinarump Formations) contain kaolinitic paleosols that display gley features but generally lack calcretes. Paleosols of the (Upper Carnian) Blue Mesa Member of the Petrifi ed Forest Formation are mostly mature Alfi sols that have distinctive horizonat...
We report the detection of upper main sequence stars and red giant branch stars in the halo of an amorphous galaxy, NGC 3077. The observations were made using Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The red giant branch luminosity function in I-band shows a sudden discontinuity at I = 24.0 ± 0.1 mag. Identifying this with the tip of the red giant branch (TRGB), and ad...
Jupiter's atmosphere features a variety of clouds that are formed from the interplay chemistry and atmospheric dynamics, deep red color Great Red Spot to high altitude white ammonia present in zones (bright bands atmosphere). Beneath these upper level clouds, water condensation occurs, sporadically leads formation towering convective storms, driven by release large amounts latent heat. These st...
The study area is situated in the Middle part of the Tabas Block. It contains outcrops of rocks that formed along longitudinal faults in Early Cimmerian orogenic phase. The basin subsided along these faults from the Late Triassic to Early Cretaceous, which include two sedimentary cycles. A sedimentary cycle, related to Upper Triassic to Bajocian is known as Shemshak group. Another sedimentary c...
Observations by the MACHO collaboration indicate that a signi cant fraction of the galactic halo dark matter may be in form of compact objects with masses M 0:5M . Identi cation of these objects as red or white dwarfs is problematic due to stringent observational upper limits on such dwarf populations. Primordial black hole (PBH) formation from pre-existing density uctuations is facilitated dur...
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