1 INTRODUCTION  
2 QUARKS ACA DATA  
2.1 Observing Strategy  
2.2 Data Calibration and Imaging  
3 QUARKS ATLAS  
4 RESULTS  
4.1 ACA 1.3 mm Continuum Source Catalog  
4.2 Temperature Estimation from Formaldehyde  
4.3 Physical Parameters of Sources  
5 DISCUSSION  
5.1 Nature of ACA Source  
5.2 Correlation Between Clumps and Fragments  
5.3 Dense Gas Fraction and Its Assembly  
5.4 Limited Fragmentation  
6 SUMMARY