formation

UNIQUE one of a kind formation, WOW. I found this rock (sandstone?) laying shoreline in a small bay on a lake in British Columbia, Canada. It had been sitting here for ages being washed away and eroded into its final form as is today. Ive had this rock desk side for a while and its time to...

My son brought this over, wanting to know if I could find out what it is. I thought u could find out on my own so I didnt get the best pics for you guys, I couldn't find anything. It almost looks like and feels like flint but not sure. The layers are confusing, I want to think it might be...