Cretaceous late Early

Age of formation of Group B of Besshi-subtype are variable, early Cretaceous (Shimokawa), late Early Cretaceous to early Late Cretaceous (Makimine) and Triassic to Jurassic (Minenosawa, Kune). 

Mack G. H. (1992) Paleosols as an indicator of climate change at the Early-Late Cretaceous boundary, southwestern New Mexico. J. Sedim. Petrol. 62, 484-494. 

Figure 1 Phanerozoic carbon isotope record. Mass extinction intervals are shaded in gray (widths do not correspond to durations of inserts) (a) global marine carbonate record (after Veizer et al, 1999) (b) marine carbonate record from the Late Ordovician of the Baltic States (after Brenchley et al, 1994) (c) Late Devonian marine organic carbon record from New York State (after Murphy et al, 2000) (d) Late Permian marine carbonate record from China (after Bowring etal, 1998) (e) Late Triassic marine organic carbon record from Canada (after Ward etal, 2001) (f)Late Cretaceous-early Tertiary record of the carbon isotopic difference between fine fraction and benthic carbonate (left panel), between shallow dwelling planktonic and benthic foraminifera (open symbols, right panel) and between more deeper dwelling planktonic and benthic foraminifera (filled symbols, right panel) from the south Atlantic...

Barrera E. (1994) Global environmental changes preceding the Cretaceous-Tertiary boundary, Early-Late Maastrichtian transition. Geology 22, 877-880. 

Retallack [2] computed relative acidification for the Brownie Butte boundary bed by using the impact bed as the parent material, and obtained a value of 0.054 meq cm. Since typical late Cretaceous/early Paleocene paleosols have acid consmnption rates of 0.01-0.02 meq cm yr" , this is evidence for enhanced leaching from the boundary bed relative to the impact bed. Because the boundary bed was emplaced -minutes to hours after tlie impact [33] and the bulk of the impact bed (including shocked quartz) was emplaced -hours to days after tlie impact bed, the boundary bed may have experienced somewhat greater acid deposition. This was true only if significant acid deposition occurred in tlie interval between boundary and impact bed emplacement. In the normal atmosphere rainout of acid in the troposphere occurs on timescales of days in the post-impact atmosphere rainout may have occurred soon after the unpack once the atmosphere cooled. Because of the uncertainties in such timescales and the possibility of different parent material compositions for the impact and boundary beds, we do not consider tlie relative acidification of the two beds further. 

Angiosperms became widespread during the Late Cretaceous-early Tertiary (Crane Lidgard 1989), but prior to that gymnosperms dominated, and their distinctive diterpane distributions have been traced back to Carboniferous rocks (Disnar Harouna 1994). With appropriate regional palynological calibration, the ratio... 

Merewether, E. A. Gautier, D. L. Composition and depositional environment of concretionary strata of Early Cemomanian (early Late Cretaceous) age, Johnson County, Wyoming 2000 1917-U, p 33. 

Franciscan formation Late Jurassic to early Late Cretaceous- e, thickly bedded to massive sandstone with thinly interbedded siltstone and claystone. 

A Boreal brachiopod fauna of five species was found in Okutadami, central Japan Ammonaria sp., Kochiproductus sp., Yakovlevia sp., Spiriferella sp. and Attenuatella sp., indicating a late Middle Permian (Midian) age. The Okutadami fauna is the first documented Permian Boreal brachiopod fauna in Japan. The occurrence of the Boreal brachiopod fauna from Okutadami suggests that the fossil-bearing rocks were formed at the northernmost part of Japan in the Middle Permian, and afterwards moved relatively to the central part by the large-scale left-lateral strike-slip faulting in Cretaceous, probably late Early Cretaceous (Aptian-Albian), time. 

As a first example, we consider the diagenesis of clastic sandstones in the Gippsland basin, southeastern Australia, basing our model on the work of Harrison (1990). The Gippsland basin is the major offshore petroleum province in Australia. Oil production is from the Latrobe group, a fluvial to shallow marine sequence of Late Cretaceous to early Eocence age that partly fills a Mesozoic rift valley. 

The Late Cretaceous Pebble deposit is located within the southern part of the Late Jurassic to Early Cretaceous Kahiltna terrane, which is bounded to the southeast by the Peninsular terrane (Late Triassic to Late Jurassic) and to the northwest by flysch of the Kuskokwim Group (middle to Late Cretaceous) (Fig. 1). The southern Kahiltna terrane consists predominately of Jurassic to Cretaceous turbidite deposits and can be divided into two major lithologic units the Koksetna River sequence and the Chilikadrotna Greenstone (Wallace etal. 1989). The... 

Igneous activity that occurred between Late Cretaceous and Early Tertiary time shows a strong northeast-southwest trend, which is also evident in the regional aeromagnetic data. The aeromagnetic... 

Bouse, R. M., Ruiz, J., Tidey, S. R., Tosdal, R. M., and Wooden, J. L. (1999). Lead isotope compositions of Late Cretaceous and Early Tertiary igneous rocks and sulfide minerals in Arizona Implications for the sources of plutons and metals in porphyry copper deposits. Econ. Geol. 94, 211-224. 

Harries P. J. and Little C. T. S. (1999) The early Toarcian (Early Jurassic) and the Cenomanian-Turonian (Late Cretaceous) mass extinctions similarities and contrasts. Palaeogeogr. Palaeoclimat. Palaeoecol. 154, 39-66. 

Late Jurassic-early Cretaceous caprocks of the southwestern Barents Sea fracture systems and rock mechanical properties... 

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