Abstract Late brittle extension is a common feature in orogenic belts, and its role mountain building processes still the subject of debate. Its timing relationship with crustal thickening, topography, basin infill, rock exhumation are key importance determining whether it major factor development or merely causes near-surface secondary effects. We examined this question relation to active arc-...

In this paper, the main problem and countermeasure of fruit production quality and safety were studied in Yanshan Mountain. The subjective factor was fruit farmer quality and safety consciousness faint, and the objective factors were: severe orchard environmental pollution, faint fruit postharvest handling, lag in process technology, fruit quality determination and market inspection system is n...