The Federal Supreme Court has established that treaties are subject to constitutional review and enjoy the same hierarchical position as ordinary legislation (leis ordinárias, or "ordinary laws", in Portuguese). A more recent ruling by the Supreme Court in 2008 has altered that scheme somewhat, by stating that treaties containing human rights provisions enjoy a status above that of ordinary legislation, though they remain beneath the constitution itself. Additionally, as per the 45th amendment to the constitution, human rights treaties which are approved by Congress by means of a special procedure enjoy the same hierarchical position as a constitutional amendment. The hierarchical position of treaties in relation to domestic legislation is of relevance to the discussion on whether (and how) the latter can abrogate the former and vice versa.
What is the Portuguese term for ordinary laws?
leis ordinárias

On October 1, 1989, a peaceful demonstration of 10,000 to 15,000 people was violently dispersed by the militia in front of Lviv's Druzhba Stadium, where a concert celebrating the Soviet "reunification" of Ukrainian lands was being held. On October 10, Ivano-Frankivsk was the site of a pre-election protest attended by 30,000 people. On October 15, several thousand people gathered in Chervonohrad, Chernivtsi, Rivne, and Zhytomyr; 500 in Dnipropetrovsk; and 30,000 in Lviv to protest the election law. On October 20, faithful and clergy of the Ukrainian Autocephalous Orthodox Church participated in a synod in Lviv, the first since its forced liquidation in the 1930s.
Prior to the October 20 synod, when was the last one held in Lviv?
1930s

Glacial abrasion is commonly characterized by glacial striations. Glaciers produce these when they contain large boulders that carve long scratches in the bedrock. By mapping the direction of the striations, researchers can determine the direction of the glacier's movement. Similar to striations are chatter marks, lines of crescent-shape depressions in the rock underlying a glacier. They are formed by abrasion when boulders in the glacier are repeatedly caught and released as they are dragged along the bedrock.
What are chatter marks?
lines of crescent-shape depressions in the rock underlying a glacier