Abstract
The beginning of the Iron Age on the Caspian Sea coast and the adjacent areas on the Iranian plateau and the neighboring lands was accompanied by extensive social, political and cultural changes that led to the collapse of urban centers and exchange economics, the formation of scattered and rural communities, which were often followed by livestock or nomadic economics. Changes in the social structures in the Bronze Age and the beginning of the Iron Age, for whatever reason, caused extensive changes in the cultural material of the Iranian plateau and the Caspian Sea and formed settlement patterns from which only the associated cemeteries have often been identified and excavated. However, the residential structures, the spatial organization of the settlements and their relationship with the cemeteries are not well known. Excavation on the Parija Tepe, 3 km from Qaem-Shahr-Kiakola road on the low shores of the Caspian Sea, resulted in the identification of two stages of settlement from the Iron Age and the Early Islamic period. The Iron Age finds include pottery, metal objects, stones, bones, animal remains, and the remnants of architectural structures. According to the obtained evidence, the largest volume of cultural layers in the Parija Tepe is related to the Iron Age. The present study indicates that the Parija Tepe has an important place not only in better understanding of the pottery traditions of the Iron Age in the Caspian lowlands, but also in identifying mud-brick architecture and the pattern of sedentary life in this region. Further archaeological excavations of the site will undoubtedly give a clearer perspective on the social organization and settlement patterns of the Iron Age in the coastal areas of northern Iran.
Keywords: Mazandaran, Tepe Parija, Iron Age, Mud-brick, Pottery.

Introduction
One of the characteristic features of Iron Age sites of Mazandaran is the lack of settlement sites with visible architecture, the abundance of cemeteries, special funeral rituals, as well as a distinguished pottery tradition. During the Iron Age, the majority of dead people were buried in simple pit graves, Mud-brick lined graves or Pithos burials. The dead were often buried in a curved or flexed position, and in limited cases in supine or stretched position. A variety of burial-goods often placed next to the dead, a tradition which was also common in the preceding Bronze Age and that became more prominent during the Iron Age. In addition to the large number of pottery vessels, a good variety of tools such as swords, daggers, knives, spears, and other objects made of bronze and sometimes iron, as well as jewelry such as rings, bracelets, necklaces, plaques, and seals of bronze, silver, iron, bone, faience, stone, and rarely gold have been reported alongside the skeletons. While results of archaeological research in the Iron Age sites of Mazandaran suggests the influence of local Bronze Age cultures on the later Iron Age communities but, it appears from the available evidence that the Iron Age settlements are smaller albeit larger in number compared to the Bronze Age sites. 
The present article introduces the results of excavation in Perija Tepe in the Caspian Sea shores. Results of excavations suggests the important role of Parija Tepe not only for a better understanding of the Iron Age pottery traditions in the coastal lands of the Caspian Sea, but also for the identification of permanent settlements through examination of mud-brick architecture and the pattern of sedentary life in this region. Archaeological excavation at Parija Tepe can provide a clearer perspective of the social organization and settlement patterns of the Iron Age in the coastal areas of northern Iran.

Discussion
Parija Tepe is located in the central part of Mazandaran plain, some 3 km to the northwest of Ghaemshahr, next to the road from Ghaemshahr to Kiakola (Simorgh) and among the paddy fields of Kolagar village. Recent excavation at Parija Tepe has led to the identification of two phases of settlement belonging to the Iron Age and the early Islamic period. The main settlement phase and the majority of cultural depositions at Parija Tepe dates back to the Iron Age which is divided into Iron Age II and III. 
Typologically, most pottery forms of Prija appears to reflect the characteristics of Iron Age II. In addition to the pottery vessels, significant cultural materials such as a tanged bronze spearhead and a stone stamp seal were also excavated. One of the most remarkable findings of this excavation is the discovery of remains of mud-brick architecture that possibly shows a sedentary lifestyle rather than a nomadic way of life. Bio-archaeological studies on the faunal remains of the site demonstrates that all animal bone remains belong to mammals, and no fish, birds, rodents or reptiles have been identified. Throughout the occupational period, sheep, goats and cattle are the dominant species, followed by boars. Very rare remains of red deer have also been seen. Thus, it seems that the subsistence economy of the inhabitants of Prija has been diverse and based on livestock activities, agriculture and hunting patterns.

Conclusion
The cultural material discovered from excavation of Parija Tepe represents the cultural traditions of the Iron Age and indicates cultural links between this area and other Iron Age sites in the northeastern and north-central regions of Iran. Although some rich cultural materials such as a tanged bronze spearhead and some pottery forms have their roots in the Bronze Age cultures of the Northeast and the Gorgan Plain, the production of these type objects has continued throughout the Iron Age and striking analogies could be seen in large areas of Gilan and Mazandaran and the southern slopes of Alborz. It seems that the main volume of pottery and other cultural materials retrieved from Parija excavation indicates to Iron Age II and II period occupation with the material cultures resembling those from contemporary cultures in the north and northeast of Iran. The results of preliminary studies of Parija Tepe indicates that this area, like many of its contemporaries in Mazandaran, is formed near the river and in a flat and fertile land, and in terms of architecture, similar to other Iron Age sites in Mazandaran, has wooden and mud-brick architecture. Therefore, Parija, along with other Iron Age sites of the region, indicates to the uniformity of the Iron Age material culture in the lowlands of Madandaran, which, while similar to the Iron Age cultures of the southern slopes of Alborz, has particular local features.

Abstract
Excavations at Gird-iAshoan, An Archaeological mound in Piranshahr County in the Lower Zab Basin, provided remarkable insights into cultural traditions characterizing the region in the Late Chalcolithic. Whilst reflecting some indigenous peculiarities, its material culture exhibits broad affinities with Northwest Iran, Caucasia, and Anatolia. This evinces the spread of the Late Chalcolithic (LC) cultures, especially LC2‒3, over vast territories, which could imply either population movements or spread of a certain pastoralist subsistence system. of the total of four architectural phases presently known from the Chalcolithic deposits of Gird-i Ashoan, the two upper phases were recorded in the first season. Phase 1 consisted of dry-laid stone walls in the northern quadrant of the trench,while Phase 2 was represented by perpendicular mudbrick walls beginning from -3.43m and ending at -3.62m. The recovered mudbricks measured 40 × 60 cm. In this paper, an attempt is made to explain the cultural relations of the Zab basin with other regions by presenting a detailed stratigraphy, and an analysis of the recovered architectural remains. To conclude, observations made at Gird-i Ashoan suggest that in the fourth millennium, the Early Chalcolithic III‒II culture reached the Zab region, where it would eventually be replaced by the subsequent Hasanlu VII culture. In this article, we will introduce the Architecture remains and the methods. With its thick deposit of 8.65 m, Gird-i Ashoan in the Zab basin represents a key point in northwestern Iran.
Keywords: North-West Iran, Pisdeli, Late Chalcolithic Period, Mud-brick Architecture, Chaff-Tempered (CFW).

Introduction
The opening of the 5th millennium BC coincided with the arrival of the Dalma cultural tradition, which extended over vast territories (Hamlin 1975; Henrickson 1983; Henrickson and Vitali 1987). It was to be superseded in the mid-5th millennium or somehow later by the Pisdeli tradition (Dyson 1968; Dyson and Young, 1960: 20). The Pisdeli horizon, designated as Hasanlu Period VIII, was dated between 4300‒ 4500 BC (Voigt and Dyson 1992), which is also corroborated by radiocarbon dates (Danti et al., 2004). It was eventually replaced by the cultural tradition of the Late Chalcolithic in the region. An outstanding question about the period in northwest Iran concerns the little-known phases of Late Chalcolithic III‒II. The time-span is of particular import for the regional archaeology as it has a bearing on the phenomenon of social complexity and the beginning of the urbanization. Unfortunately, ambiguities remain about the chronology of the period due to the lack of regular excavations. Although recent discoveries have provided new information in this regard, the absence of serious excavations of the Chalcolithic deposits deprives us of the attributes of the coeval culture. Mellaart regards the Ubaid as a Late Chalcolithic culture (1966). Helwing splits it into three sub-periods, with the earliest being the Pisdeli (LCh I) (Helwing, 2012: 204) and the Chaff-Faced Ware (CFW) typifying the subsequent LCh III ‒II (Helwing, 2005). In Iran, related material is currently known from Gird-i Ashoan and Kul Tepe, while beyond the Iranian borders they occur at several sites, among them being Çadır Höyük, Kenan Tepe, Arslantepe, Barcın Höyük and Höyük in Anatolia and Leyla Tepe, Beyuk Kesik, Mentesh Tepe, and Alchan tepe in Caucasia (Baxşeliyev, 2010).
Following preliminary inspections, Gird-i Ashoan was selected for excavation in 2019 as the key Late Chalcolithic site. Among the main objectives of the present study were gaining an insight into the settlement sequence, examining the Hasanlu VIII cultural tradition of the Zab basin in light of recent archaeological finds, and investigating the cultural interactions of the local populations with the neighboring regions. Attempts were made to obtain a better understanding of the Late Chalcolithic cultural horizon. The excavation at Gird-i Ashoan yielded a assemblage of Pisdeli painted ware (LCh I), while the LCh III ‒II ceramics, the so-called Chaff-Face Ware native to northern Mesopotamia, were attested in abundance. In the period that immediately followed the Ubaid, North and South Mesopotamia each began to proceed along different directions culturally. Hence, the southern sphere witnessed the spread of the Uruk tradition, while the northern one would be overwhelmed by the Chaff-Faced Ware culture (Kepinski, 2011:65). This ware type occurs over vast territories, which also includes northwest Iran, where the related material culture and chronology share wide affinities with the sites of North Mesopotamia, Syria and East Anatolia, in particular by the latter half of the 4th millennium (Helwing, 2004:16). The location of Gird-i Ashoan close to northern Mesopotamia and eastern Anatolia significantly contributed to the materialization of the shared traditions. 
  East Anatolia, South Caucasia and Northwest Iran served as the milieus for the genesis and further development of the Chaff-Faced Ware tradition and later the Kura-Araxes culture. The regions have always been the crossroads of various peoples with diverse ethnic and cultural affiliations, and most of the migrant or invading groups would cross them in their east-west movements over the centuries. 
Geographic Location of Gird-i Ashoan 
The mound lies at UTM X.520062 Y.4057880 at an altitude of 1415 m, at the eastern fringes of the Piranshahr plain, on the east bank of the Lavin River. The northern and western flanks of the mound are about 330m and 450m off the riverbed, respectively. The site is within the boundaries of the modern village, flanked by its buildings. It is a mound with a circular base of about 55 m in diameter. Measuring about 55m north-south and 50m east-west, it occupies a total area of ca. 2750 sq. m. The east and south slopes gently descend against the walls of the villagers’ houses. 

Pottery
Pottery represents the most abundant category in the artefactual assemblage. The pieces are plain, with a profusion of chaff and fine grit added as temper to their fabric, leaving them with a pockmarked appearance, thus the designation “chaff-faced pottery.
The sherds from Gird-i Ashoan have brown, orange, and grey surfaces, are poorly fired, and bear a thick slip, though rare examples of thin slip are also attested. The applied ornamental elements include carved motifs and incised grooves. The ceramics of the Late Chalcolithic III and II are invariably chaff-tempered and handmade.
The pottery falls into three categories: plain, incised and painted. The last is represented by three sherds of Pisdeli type bearing black motifs on a buff ground. As regards morphology, the excavated pieces can be divided into several groups: 1. Open pithoi with everted rim, which are the most common form at Gird-I Ashoan and exhibit the closest ties with different regions of Anatolia, the Caucasus and Mesopotamia. 2. Open bowls. 3. Shallow trays, albeit in extremely limited numbers. 4. Closed jars. 

Architectural Remains
Mudbrick wall: Part of a brick wall (F.1017) was exposed along the southern section of the trench. It began from -2.35 m and continued to the depth of 3.19m. The individual grit and sand tempered mudbricks variously measured 60×40× 9cm, 56×39× 9 cm and 56×32× 9 cm, and ranged from brown-buff to red-brown in color. Both the bricks and the wall oriented north-south. The surfaces of the wall was lined with a clay coating that contained the same grit and sand particles. The small segment uncovered at the center of the trench near the southern section represented the corner of two perpendicular walls: the north-south wall of F. 1017a and the east-west wall of F. 1017b . The associated floor surface was recorded at -3.19m. It consisted of a compacted silt-clay deposit mixed with sand, charcoal particles and ash. In is notable that the floor surface sealed a layer of debris that was accumulated over time. 
At a depth of 3.62 m near the western section, a pottery vessel was found to be intentionally included into a 55×55 cm mudbrick. This poorly fired vessel was made of a chaff-tempered fabric with a black core. Quite interestingly, the embedded vessel was meant to serve as reinforcement.
Mudbrick floor: Near the western section, the mudbrick floor (F. 1021) was encountered at -3.5m. The structure was formed by laying down brown mudbricks of varying dimensions. Recorded were square (55×55cm) and rectangular examples as well as fragmentary bricks set, rather irregularly, into a red -brown clay mortar. In two cases, the mudbricks were reinforced by embedding insufficiently fired pottery vessels of a paste with black core. The exposed part of this flooring extended 0.7m north-south and about 0.4m east-west. A very small part of a second flooring (F.1022) was cleared in the southeast quadrant of the operation at the depth of 3.95m.
With its thick deposit of 8.65m, Gird-i Ashoan sited in the Zab basin represents a key point in northwestern Iran. 

Conclusion 
Excavations of Gird-i Ashoan revealed an LCA deposit, which extended from the depth of 1.00 m down to a depth of -9.65 m. Results from the excavations of the site are indicative of the interactions and cultural similitudes of the occupants of Gird-i Ashoan with northwest Iran, north Mesopotamia, Anatolia and Caucasia. The period is marked by the spread of the technological horizon of Chaff-Faced ware, a widespread cultural phenomenon covering vast territories, (Palumbi, 2011: 211; Helwing , 2012:  204) which displays fairly consistent cultural attributes (Helwing 2012:  207).
The material culture from the site exhibits close relationships with those of the coetaneous centers of the Lake Urmia region, on the one hand, and Anatolia, Caucasia and Mesopotamia, on the other. In effect, given the geographic location of the Zab basin as a cross-regional crossing, we may conjecture that Gird-i Ashoan might have served a transitional role in this communication network. The hypothesis seems to be confirmed by the discovery of the obsidian pieces. To conclude with, observations made at Gird-i Ashoan suggest that in the 4th millennium the Early Chalcolithic III‒II culture reached the Zab region, where it would be eventually replaced by the subsequent Hasanlu VII culture.