Abstract
The first season of archaeological survey in Marivan by a team from University of Bu-Ali sina Hamedan was lead to identify some prehistoric sites from Middle Paleolithic to Chalcolithic period. As a result of in mentioned investigation prehistoric cultural sequence of the area from Middle Paleolithic to Middle Chalcolithic period (except Late Neolithic and Early Chalcolithic) have been identified. So, there was a main question about the absence of Late Neolithic and Early Chalcolithic period sites of Marivan area. Fortunately, during our recent archaeological survey in Marivan, we succeeded in discovering an interesting site (Qala Ziwa) which has traces Late Neolithic and Early Chalcolithic (J ware). In addition to Late Neolithic and Early Chalcolithic (J ware), some typical Dalma related pottery was also sampled from the site. Among mentioned potteries, we believe that most important period can be considered as Early Chalcolithic period. Against other regions of Western Iran particularly Central Zagros that many Early Chalcolithic period sites were identified, this area is really less known and obviously Qala Ziwa is one of the first Early Chalcolithic period site ever reported from Marivan area. This site has typical J ware and compared with similar Early Chalcolithic period sites in Central Zagros. This pottery has been related to the Western parts of Central Zagros like Mahidasht zone and discovering J ware in Marivan can added this area to the distribution zone of this culture also. As mentioned, surface survey of the site showing that Qala Ziwa has a complete sequence from Late Neolithic to Middle Chalcolithic period. So, excavation of the site in order to clarifying stratigraphy of the site would yield valuable information regarding too late six millennium B.C archaeological studies of Western Iran.
Keywords: Qala Ziwa, Late Neolithic, Early Chalcolithic, J Ware, Marivan.

Introduction
Looking to the geographical position of Marivan area, it became clear that this region is placed between 2 of the main archaeological zone of entire Western Iran (Central Zagros in South and Urmia lake basin in North). Prehistoric Archaeologist studies concentrated at those 2 mentioned zone and did not pay attention to the prehistoric sites (particularly Neolithic period) of studied (Marivan and adjacent areas). Fortunately, the situation has changed recently and a few Neolithic period sites have been reported not only in Marivan but at the areas like Bijar region (Motarjem & Sharifi, 2018). For the first time was identified 2 Neolithic sites in 2002 (Mohammadifar & Motarjem, 2003, 2015). Two Marivan Neolithic period sites (Tepe Hamaomin and Hamamorad) dating to early period of Neolithic (Mohammadifar & Motarjem, 2003, 2015) and as mentioned, there was not any information about Late Neolithic and Early Chalcolithic period sites of the area. Noted that as result of first archaeology survey of Marivan by Bu – Ali sina university expedition some sites from Middle Paleolithic to Middle Chalcolithic period (except Late Neolithic and Early Chalcolithic sites) reported. So, there was this important question that what happened after Early Neolithic period in Marivan region and why no Late Neolithic and Early Chalcolithic site was reported? Why there is such long gap time (more than 3 millinume) in this area? Discovering Qala Ziwa which contain cultural deposits from Late Neolithic and Early Chalcolithic is may fill this cultural gap obviously.

Methodology
The research methodology uses in this study is based on primary surface survey. Regarding to the importance of the site for late 6 millennium B.C archaeological studies, the site was surveyed carefully and from each periods typical pottery was sampled. As common in archaeological studies the sampled potteries have been sorted, photographed and analyzed. Our preliminary analyzes showing that this site has 3 different archaeological deposits: Late Neolithic (?), Early Chalcolithic, and early phase of Middle Chalcolithic period (Dalma phase). Any way future studies and even excavation would tell us more about this interesting site. 

Conclusion
Even as result human interference like agricultural activity the surface of the site was damaged, and it is not possible to sample data systematically, but distribution pattern of surface pottery was really interesting. As mentioned, surface pottery showing that the site would contain the deposits of 3 different archaeological periods:  Late Neolithic (?), Early Chalcolithic, and early phase of Middle Chalcolithic period (Dalma phase). The pottery of last period (Dalma phase) scattered at the highest level of Tepe, J ware was sampled in Middle part and   Late Neolithic shreds distributed at the lowest level of the site. Even such surface observation is not so trusted and archaeological excavation may show something different, but this pattern is really similar the stratigraphy of some Central Zagros sites like Seabed and Chogha Maran. In Chogha Maran the Early Chalcolithic deposits characterized by J ware lay on the virgin soil and Middle Chalcolithic is the upper one. In Siabid the most ancient cultural deposits belonging to Late Neolithic period which Early Chalcolithic (J ware) and Middle Chalcolithic are upper layers. But in some other site like recent excavated site like Tepe Qeshlagh in Bijar the situation is completely different. In Tepe Qeshlagh the most ancient layer is Late Neolithic deposit which upper layer is Dalma phase. But as mentioned in Tepe Qala Ziwa and some other Central Zagros sites, J ware would place between Late Neolithic layer and early phase of Middle Chalcolithic period (Dalma period). All mentioned document demonstrated that this new discovered site can be compare with Central Zagros region and particularly Western part like Mahidasht zone. As mentioned there was not any information about Late Neolithic and Early Chalcolithic period of this area of Western Iran and Qala Ziwa is one of the first discovered site of this period. Obviously, future archaeological survey and excavation would yield remarkable information about archaeology of late six millennium B.C of Western Iran. 

Abstract
The city of Ghorveh is located in the south east of Kurdistan province and in the east of central Zagros. This city is a part of the Qezal Owzan River Basin. This region has an archaic history from prehistoric periods to the Islamic ones due to favorable geographical conditions. According to the surveys, in the Ghorveh City, 35 sites dating to the Parthian period have been identified. This paper studies the Settlement Pattern of Parthian sites and their relationship to the geographical environment. The settlement pattern initially divided into four clusters based on the area of the premises and then five factors were considered based on the maps drawn from the GIS. These factors include: Altitude from sea level, The distance from the river, The slope, steep direction and Land use. In addition, taking advantage of Spss software, the settlement clusters have been statistically studied and their correlation and relevance using factors were discussed. Based on the results, there is a significant relationship between clusters and some factors. In general, most of the sites are located in clusters one and two that are less than two hectares. In terms of settlement pattern, some of these sites were temporary settlements that were grazing and a number of others are not known exactly, but probably there were fixed settlements that were small villages of agriculture and livestock. But clusters three and four were all permanent settlements that were engaged in agriculture, horticulture, and animal husbandry. In general, two types of temporary and permanent settlement patterns observed in the Parthian period in the city Qorveh.     
Keywords: Ghorveh, Parthian, Settlement Patterns, GIS Software, SPSS.

Introduction
The Parthian dynasty is one of the most important Iranian historical kingdom who entered the arena in extremely difficult political and social conditions and revived some of the ancient Iranian features (Mohammadi, 2010: 4). This dynasty ruled Iran for nearly five centuries from 248 BC to 224 AD (Mohammadi, 1391: 13) they were able to establish cities and government centers (Kiani, 1374: 240). And their territory expands from the eastern parts of Iran to the Tigris and Euphrates. During this period, in addition to Sedentary and urban settlements, there are nomadic settlements. Examples of this type of nomadic settlement during this period can be found in the Central Zagros (Niknami & Mohammadi, 1394; Mohamadifar & Niknami, 2013; Niknami et al., 2013).
In Qorveh city 35 sites have been identified related to Parthian period (Behnia, 2008). Most sites of this city are small settlements (Mafi et al., 2009. 85). Parthian pottery is simple, glazed, imprinted, and clinched in Qorveh. But the most prominent Parthian pottery is in western Iran as well as in the Qorveh city of Klineik pottery. The pottery has been scattered from Kermanshah to the northern parts of Zanjan in terms of its geographical extension. Also from Chamchamal plain (Mohammadifar, 2007). Kangavar Plain (Young, 1975) and in historic sites of Bistoon, Jogar Malayer Tape, Noshijan, Ray, Shush, West Islamabad and Boroujerd have also been reported (Hernik, 1997: 117). 
In this area, there have been Sedentary and nomadic settlements since the pre-historic time. It is necessary to study the continuity of these settlements in historical periods. It is necessary to study the continuity of these settlements and types of Sedentary and nomadic settlements in historical periods. This research is based on data obtained from the field survey. In this research is used a descriptive-analytical method, and for accurate analysis of Parthian period settlement pattern in Qorveh city has been used the Gis software and Spss statistical software. Based on the available data, 6 factors are considered. Including: 1. Altitude above sea level 2. Distance from river 3. Distance from road 4. Slope 5. Slope direction 6. Land use. To analyze the settlement patterns, it is divided into four clusters based on size of the sites. Then, to analyze these clusters using factors and according to data type and purpose of research were used one-dimensional, regression and R-pearson tests of Spss software.

Identified Traces
In order to analyze the settlement patterns, the sites are divided into four clusters based on by size. According to the type of data which are nominal and scaled and the purpose of the research were used One-Dimensional, Regression and Rpirson tests of the Spss software. This analysis consists of two descriptive and inferential stages.  
The cluster one is the largest in the series. sites of this cluster are less than 1 hectare. According to the data, %57/1 of the sites belongs into this cluster. Cluster two consists of sites between 1 and 2 hectares. The third cluster is sites ranging from 2 to 3 hectares and the fourth cluster consist of sites of more than 5 hectares.
The size of the sites was considered as an independent variable and the six factors mentioned as dependent variable. According to the results of multivariate regression test, there is a significant relationship between the size of the sites factor with other factors. This relationship was strongly inverse between The size of the sites and the distance from the river was Relatively Severe Reverse.  Briefly, Larger sites are closer to the river and as the sites are smaller, they appear farther from the river. But there is no relationship between the size of the sites with the factors of altitude and slope. In addition, to understand the test results, the Cluster diagrams need to be studied. By studying the cluster diagram it can be seen that clusters one and two are in all factor categories. For this reason, there is no correlation between all factors. 

Conclusion
Based on the results of the analysis on four clusters. Cluster One is the largest cluster, There are two types of settlements. The first type of settlements is far from the river so they are located at higher altitudes. The second type located on the lower elevations and slopes near to the river. In the second cluster, the settlements are closer to the river. these sites are located at higher altitudes and different slopes. In the third cluster, the sites are closer to the river. These sites are located at low slope and low altitude. The fourth cluster settlements approach the water source. But in terms of slope and altitude are at different altitudes. In clusters one and two, there is Sedentary and nomadic settlement, But clusters three and four are Sedentary settlement that constituted a small percentage.
In general, the settlements of Qorveh city in Parthian period are in two forms: Sedentary and nomadic. Sedentary settlements have agricultural and Husbandry economies due to their geographical Charactristics, But seasonal settlements used to grazing. In fact, most of the sites include seasonal settlements. This type of settlement in this region have been prehistoric times of chalcolithic and Bronze Ages (Kura-Araxes) and in this period we also see the continuation of this type of settlements.