Tectonic and geologic evolution of Syria

Publisher's version archived with permission from publisher.Using extensive surface and subsurface data, we have synthesized the Phanerozoic tectonic and geologic evolution of Syria that has important implications for eastern Mediterranean tectonic studies and the strategies for hydrocarbon exploration. Syrian tectonic deformation is focused in four major zones that have been repeatedly reactivated throughout the Phanerozoic in response to movement on nearby plate boundaries. They are the Palmyride Mountains, the Euphrates Fault System, the Abd el Aziz-Sinjar uplifts, and the Dead Sea Fault System. The Palmyrides include the SW Palmyride fold and thrust belt and two inverted sub-basins that are now the Bilas and Bishri blocks. The Euphrates Fault System and Abd el Aziz-Sinjar grabens in eastern Syria are large extensional features with a more recent history of Neogene compression and partial inversion. The Dead Sea transform plate boundary cuts through western Syria and has associated pull-apart basins. The geological history of Syria has been reconstructed by combining the interpreted geologic history of these zones with tectonic and lithostratigraphic analyses from the remainder of the country. Specific deformation episodes were penecontemporaneous with regional-scale plate-tectonic events. Following a relatively quiescent early Paleozoic shelf environment, the NE-trending Palmyride/Sinjar Trough formed across central Syria in response to regional compression followed by Permian-Triassic opening of the Neo-Tethys Ocean and the eastern Mediterranean. This continued with carbonate deposition in the Mesozoic. Late Cretaceous tectonism was dominated by extension in the Euphrates Fault System and Abd el Aziz-Sinjar Graben in eastern Syria associated with the closing of the Neo-Tethys. Repeated collisions along the northern Arabian margin from the Late Cretaceous to the Late Miocene caused platform-wide compression. This led to the structural inversion and horizontal shortening of the Palmyride Trough and Abd el Aziz-Sinjar Graben

An efficient test relaxation technique for synchronous sequential circuits

Testing systems-on-a-chip (SOC) involves applying huge amounts of test data, which is stored in the tester memory and then transferred to the circuit under test (CUT) during test application. Therefore, practical techniques, such as test compression and compaction, are required to reduce the amount of test data in order to reduce both the total testing time and the memory requirements for the tester Relaxing test sequences can improve the efficiency of both test compression and test compaction. In addition, the relaxation process can identify self-initializing test sequences for synchronous sequential circuits. In this paper we propose an efficient test relaxation technique for synchronous sequential circuits that maximizes the number of unspecified bits while maintaining the same fault coverage as the original test set

On efficient extraction of partially specified test sets for synchronous sequential circuits

Testing systems-on-a-chip (SOC) involves applying huge amounts of test data, which is stored in the tester memory and then transferred to the circuit under test (CUT) during test application. Therefore, practical techniques, such as test compression and compaction, are required to reduce the amount of test data in order to reduce both the total testing time and the memory requirements for the tester. Relaxing test sequences, i.e. extracting partially specified test sequences, can improve the efficiency of both test compression and test compaction. In this paper, we propose an efficient test relaxation technique for synchronous sequential circuits that maximizes the number of unspecified bits while maintaining the same fault coverage as the original test set

Tectonic map and geologic evolution of Syria: The role of GIS

This paper was published in the journal The Leading Edge by the Society of Exploration Geophysicists. SEG retains the copyright to this paper. See also: http://www.edge-online.org/; http://atlas.geo.cornell.edu/syria/brew_tle_2000.htmlFor the past 12 years, Cornell Syria Project scientists and colleagues at the Syrian Petroleum Company have studied the regional structure and geologic evolution of Syria. We are currently generating new structural maps and tectonic models for the whole country. Information on this region is relatively limited, despite the local importance of hydrocarbon production and abundant surface and subsurface data. Our regional approach involves new interpretations of seismic reflection profiles, well data, remote sensing imagery, and potential-field data, merged with existing interpretations of similar data sets. These interpretations, integrations, analyses, and map preparation are all performed within a GIs platform. As detailed elsewhere in this issue, the importance of GIs as a data storage and interrogation tool for petroleum exploration is well established. This article describes our use of GIs to facilitate regional tectonic mapping in Syria. Although not directly related to the search for hydrocarbons, the maps and models generated have obvious utility for oil exploration. Herein we detail the types of data being used, their integration and interpretation within the GIs, and our preliminary analysis and findings. We will show how a GIs approach eases data archiving and map generation and also provides interpretational possibilities not available with more traditional mapping procedures