Himmatnagar Sandstone (lower to middle Cretaceous) is exposed in between Sabarmati River in the west to Vantada in the east around Himmatnagar Town in north Gujarat, India. The sequence is divisible in two members: The lower member is 65 m thick, mostly massive, horizontally stratified to hummocky stratified with abundant plant and trace fossils in assorted shales and sandstones. The upper member is ~ 12 m thick, cross–stratified and medium to coarse grained–gritty to cobbly in nature. Six lithofacies have been identified in the sequence, viz. 1. grey wacke (GW), 2. silty–shale (SS), 3. cross–stratified sandstone (CS), 4. horizontally stratified sandstone (HSS), and 5. planar cross–stratified sandstone (PCS) in the lower member; and 6. gritty–cobbly cross–stratified sandstone (GCCS) in the upper member. The lower member consists of plant fossils which are poor to moderately preserved and transported. The silty–shale lithofacies contains plant fossils (Pagiophyllum, Brachyphyllum, Gleichenia, Araucarites, circinate vernation of ferns, Williamsonia flower, twigs, petrified wood, conifer and its cone, etc.), body fossil (insect wing) and trace fossils (Skolithos, Monocraterion, Psilonichnus, Thalassinoides, Chondrites, Planolites, Palaeophycus, Calycraterion, Circulichnus, Ophiomorpha, Phoebichnus, etc.). In the cross–stratified sandstone lithofacies, body fossils (mainly fragmented bivalves, plant fossils (Weichselia reticulata, Matonidium indicum, Ptilophyllum, cycadean frond and fossil wood) and trace fossils (Monocraterion, Chondrites, Calycraterion, Thalassinoides, Psilonichnus and Skolithos) are recognized. On the other hand, in horizontally stratified sandstone lithofacies plant fossils (Sphenopteris, Pagiophyllum, Gleichenia, Elactocladus, Brachyphyllum, ferns, petrified wood, etc.) and trace fossils (Skolithos, Ophiomorpha, Psilonichnus, Monocraterion, Arenicolites, Diplocraterion, Thalassinoides, Teichichnus, Palaeophycus, Planolites, etc.) are present. While, large crustacean and vertebrate burrows, Skolithos, Thalassinoides, Ophiomorpha, etc are found in planar cross–stratified sandstone lithofacies. The trace fossils belong to Psilonichnus, Skolithos and Cruziana ichnofacies as per Seilacher (1967). The member also contains wedge shape geometry of beds similar to tidal partings as well as ridge and runnel structures, low–angle to hummocky cross–stratification, herringbone structure and parting lineation. Here, north to northeast palaeo–current direction is indicated by cross–stratification in the member. All these features lead to the depositional environment, which seems to be foreshore–tidal flat to middle shoreface for the lower member of the sequence. The upper member is composed of trough cross–stratified sandstones showing prominently southwest to south palaeo–current direction with angular to sub–rounded pebbles and cobbles of underlying rocks and fossil wood with lower erosional contact and channel structures at places. Based on above characteristics, depositional environment of upper member can be interpreted from estuarine to fluvial.

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The present paper embodies a detailed account of the morphological features of Glandulataenia pantii, a new species of the leaf genus Glandulataenia Pant. It differs from the two earlier described species of Glandulataenia, G. glandulata and G. triassicus in a number of features. Glandulataenia pantii leaf is comparatively smaller in size and narrower in width and has a higher concentration of lateral veins per centimetre. The midrib is distinct and narrower than those of the earlier described species and is persistent up to apex. Between the lateral veins, are dark coloured circular glands, whose frequency varies in basal, middle and apical regions of the leaf. Leaves are amphistomatic, stomata usually restricted to areas in between lateral veins and on the midrib as well as lateral veins. Stomata haplocheilic, irregular to transverse in orientation. Guard cells sunken, each with 4 to 6 undifferentiated subsidiary cells. Cells over midrib elongated, rectangular, narrow usually thin, straight walled. Cells of lamina thin, sinuous walled.

One of the factors that related to biological aging in humans is genetic. The aging process can occur due to genetic accumulation and epigenetic modification that lead to progressive cellular damage and weakened tissue functions that causing limitation of abilities to maintain the homeostasis. Increased vulnerability to a number of inflammations due to the aging process is closely related to rising in prevalence and severity of periodontitis. The purpose of this paper is to analyze immunity of the aging process and its relation to periodontal disease in genetic aspect. Biological aging is affected by genetic variation that changes several genes that causing changes of several cell functions. Changes in DNA methylation are one of the mechanisms that contribute to the aging process, including the body immune system. Aging process influences both adaptive and innate body immune system. Changes in an immune and genetic system in the aging process could increase the severity of periodontal disease. As a conclusion, periodontal disease is an inflammation that related to aging. In the aging process, there are changes in the immune system that causes elder people more susceptible to periodontal infection. In addition, genetic and epigenetic factors also play a role in periodontal changes in elderly.

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